Curbing the browsers hunger of RAM

Firefox often occupies some 100 MB of working space, thus slowing down- depending on the amount of RAM you have-the entire system.

As an avid fan of Mozilla Firefox I always advice old nothing special IE users to shift to Mozilla Firefox. Firefox is a smooth-running browser as long as it does not rip over it's own feet. You can help it get back up by carrying out a few maintenance tasks, namely verifying the add-ons, optimizing the configuration, and deleting redundant data.

Check ADD-ONS:- However if add-ons were programmed poorly, they can be the reason that Firefox uses so much RAM.

Update:- To update Firefox, open 'Tools--->Add-ons', click on 'Extensions', select the ones you want to update in the following dialog box and then click on 'Update'.
For automatic updation, open 'Tools--->Options' and click on 'Advanced'. Then, switch to the 'Update' tab. In the 'Check for updates automatically' tab, select the
options 'Firefox' and 'Installed Add-ons' and confirm by clicking 'OK'.

Trace the memory glutton:- Open Firefox in safe mode and test whether the add-ons are the actual reason that excess memory is being occupied. Right-click on the program icon, select 'Properties' and type '-safe-mode' at the end of the link in the Target field. Confirm it and open the browser. In the startup dialog box, select 'Deactivate all add-ons' and click on 'Continue working in safe mode'.
Check the Task Manager to find out to what extent the memory usage has reduced. A difference of a few megabytes is normal because the add-ons take up space and must reserve some space for additional functions. In the difference is considerably large, then it implies that an add-on was the cause of the problem.
Restart Firefox in the normal mode. Open 'Tools-->Add-ons-->Extensions', select an add-on, click on the 'Disable' button and restart Firefox. Check whether the memory situation has improved. Then 'Activate' the add-on again and repeat the process with the next one. In this manner, you can find out the add-on that is causing the problem and deactivate it. Likely candidates for memory-related errors are those add-ons that are known memory guzzlers, including Adblock, Fasterfox, Forecastfox, and Tab browser extensions.

Optimize the configuration:- The cache accelerates the browser. But if it shifts to the swap file due to lack of free memory, the effect is reversed. Therefore, you must adjust the cache according to the amount of RAM you have.

Adjusting the cache:- Type 'about:config' in the address bar and hit [Enter]. In the 'Filter' field, enter 'browser.cache.memory.enable' has been set to the value 'true' and if not, reset it with a double-click. Now double-click on the 'browser.cache.memory.capacity' setting to customize it. If you have 4 GB RAM, leave the value proportionally, ie ; to 16384 for 1 GB RAM. For that, double-click on the setting, enter the new numerical value in dialog box and click on 'OK' to confirm the change.

Free some RAM:- Another configuration setting ensures that Firefox releases a large amount of memory when minimized. Right-click on any blank space in the Firefox window and select 'New-->Boolean'. Then, enter 'config.trim_on_minimize' and confirm with 'OK'. In the next dialog box, select 'true' and 'OK'. The setting will take effect after restarting Firefox.

Delete redundant data:- Firefox saves downloads and retains all visited websites in the history. To delete this data, open 'Tools-->Options' and click on 'Privacy'. Under 'History' , set the value of 'Remember pages last visited for the past__days' to '1' so that Firefox retains the data only for one day. Additionally, you can deactivate the option 'Remember what I've downloaded'. Click 'OK' to confirm the changes. Now click on 'Tools---Downloads'. In the list, each downloaded can be deleted individually by clicking on 'Remove' on each entry. By simply clicking on 'Clean up' , you can clear the entire list.

Upload articles on forums and websites

Being an Internet Fan, you often communicate through web mail and post many contributions on forums. Since you often use similar text to identify yourself to identify on a lot of website, you would prefer to work with auto-complete in Mozilla Firefox.


Equip Firefox with an auto text function with free extension 'Clippings'. This saves, for instance, the effort of typing in forums or complicated copying.
Installation:- The XPI file for installing this update is available on 'http://addons.mozilla.org/en-US/firefox/addon/1347'. Click in the website on the 'Install' link or open the XPI file with Firefox if you have downloaded it. Start the integration by clicking on 'Install now'. Also select the 'Restart Firefox' command to complete the installation process.

Create Clippings:- You need to first create the text before using it. Select a desired text in the browser and right-click on it. The context menu displays the update. You can either set the selected text as a clipping with 'Clippings-->New entry with selected text' or start the main dialouge with 'Clippings--->Open Clippings manager'. Further possibilities: double-click on the new text symbol on the right side of the status bar or pull the selected text to this position by drag and drop.

Managing Fragments:- After you have created the text fragments , organize them in folders in the Clippings Manager. Each folder later represents a sub menu--this gives you a quick overview. Use the 'Options-->New entry from clipboard' command to use copied texts in the quickest possible way. At this point, you can also save your data in an RDF file with 'Options-->Export'. Now close the dialog.

Using the Auto Texts:- To use these texts, right-click on the entry field of the the opened website. You can now access the hierarchy arranged folders with the sorted texts through 'Clippings' and insert them with a click.

Disabling help text

As soon as you move the cursor over a control element in Firefox, it displays help text as a tool tip. What can be useful in the initial days of working with th browser becomes annoying in the long run. For instance, the tool tip blocks access to bookmarks tool bar when you want to drag a new address from the address bar to the bookmarks tool bar using drag and drop.

The help function of the tool tip can be disabled by making a change in the settings in the advanced configuration of the browser. To do this, type 'about:config' in the address bar and hit [Enter]. The next step is to search for the 'browser.chrome.toolbar_tips' entry in the displayed list, by entering the initial letters of the entry in the 'Filter' domain. After that, right-click on the true value and select the 'Change' context command. Once you set this value to 'false', Firefox no longer displays any help text.

Configuring automatic image resizing

Previous versions of Firefox could be set to automatically resize big images on websites to fit within your program window. But the newer version(2.0) doesn't seem to offer this capability at all.

For this capability to be enabled type 'about:config' in the address bar and hit [Enter]. Search for the following entry in the displayed list: 'browser.enable_automatic_image_resizing'. In the next step, right-click on the entry and select the 'Toggle' context command to change this true value from 'true' to 'false'. With this setting, the browser always displays the images in the original size.

Adjusting memory location of the browser cache

Usually, the cache memory of the browser is in the profile data of the user. To increase the available space or speed or both, you might want to shift the cache memory to a faster drive.

The browser offers no direct path setting for the cache.Here comes the help of firefox users help blog 'http://firefoxstuffs.blogspot.com'. Any way, an entry in the advanced configuration can make it possible. First delete the data that is already stored in the cache. Open the 'Tools---> Options' for this and click on the 'Advanced' icon. Activate the 'Network' tab under it. Then in the 'Cache' area, click on 'Clear now' and then click 'OK'.
Now type 'about:config' in th address bar of the browser and press Enter key. Then, right-click on an empty space in the displayed list and select the 'New-->String' context command. Enter 'browser.cache.disk.parent_directory' as the preference name and click 'OK'. In the next dialouge box enter the complete path to the desired new memory location of the cache(eg;-C:\Program Files\firefox_ cache) and click 'OK'.

Configuring an FTP client

Mozilla Firefox and many other browsers have always had the facility to access FTP websites. However, Firefox's authentication methods are not familiar to many of the users. Here's how.

Firefox have a working FTP client. However, there is a tool that'll make it's FTP management even more productive. Go to 'http://fireftp.mozedev.org' and download the Firefox plugin called FireFTP. It is a tiny download and has a simple installation procedure. The installation is completed after you restarted the browser window.
To start the plugin, go to Tools menu and find the FireFTP menu item. First, we have to setup account setails for our FTP server. For this, click on the 'Manage Accounts' button on the top-right of the plugin window. Click the new button and start entering the required deatails into their specific fields. The 'Account name' is the name the account is to be reffered as. The 'Hostname' is the FTP address of the server you are trying to access.
There are Username and Password fiels that are needed when not using the 'Anonymous' access mode. The plugin can be easily set up with some advanced options. In the connection tab, there are options to setup encyption methods and start folders.
After setting up all the options, go to the Accounts drop down menu and choose the account that you want to open and click 'Connect'. You will find a proper two-pane file browser that will help you upload and download files from complex multi level folder structers whose appearence exactly matches that of Windows Exlporer.

Removing GO button

Besides the address bar, there is an additional button to load the entered address which we never use. After entering a URL, we can ENTER rather than hitting button which is much faster to call the page. Here's how to hide this 'GO' button to see longer URL's more clearly.

The 'GO' button can be hidden using the Firefox configuration file which creates more space to display longer URL's. To do this, enter 'about:config' in the address bar and press enter. In the list, search for the 'browser.urlbar.hideGoButton' setting. Double-click on it to change the logical value to 'true'. The 'GO' symbol will disappear immediately.

Closing tabs using a single button as done in earlier versions

Mozilla Firefox shows the cross symbol to close a window seperately for each tab. But we prefer closing each active tab with one single button on the top right.Read on to find out how this can be activated.

We can change the behaviour in the advanced configuration settings to the good operation concept described above.
Address 'about:config' and press Enter key. To search the setting, enter the value 'browser.tabs.closeButtons' in the 'Filter' field. Double click on this integer value for editing. The standard setting '1' delivers the Close symbol on each tab. With value '2' you can completely hide the symbols. Finally, the value '3' will take you back to your old setting, in which, one single symbol serves the purpose of closing any active tab.

Setting Firefox to open links in new window

When we click on HTML links from other
applications such as MSN Messenger, they
open up the active window in Mozilla
Firefox. we can set Mozilla Firefox to open links from
external applications in a new window.

When you click on links from other
applications like MSN Messenger or a help
file, they open in the most recent window
replacing its contents. To prevent this, set
Firefox to open such links in a new window.
To do so, go to ‘Tools | Options | tabs’ and
check the option ‘A new window’ and apply
the settings for the effect to take place.

opening registry keys

The web has plenty of registry tweaks you can apply to your windows xp machine. You can easily find it by Googling. The search results will show you some registry paths. But it is cumbersome to follow them by manually opening the regsitry. Instead you can install an add-on to firefox browser. You can find it at 'http://addons.mozilla.org/en-US/firefox/addon/4478'. Click install button on the webpage. After installation restart firefox as it says. After that you can select the registry entry in any website and right click. A new context menu appears. select 'Open In Registry'. The registry editor automatically opens and displays the respective key.

open multiple home pages

When Mozilla Firefox starts up it will ahows you default home page. But you can tweak your firefox browser to automatically opening more than one home page in multiple tabs.

|| Open Tools ----> Options.
|| Switch to main tab.
|| In the 'Startup' section select 'Show my home page' from 'when Firefox starts'.
|| In the home page text box , type in the URL of the websites younwant to open by seperating each one by a vertical line ( | ).
|| click OK.

Keyboard Shortcuts to switch tabs

Keyboard shortcut to switch tabs while surfing

When several tabs are open in
Mozilla Firefox, using the mouse is not
the only way to switch tabs. Instead, you
can use the keyboard shortcut ‘Ctrl+tab’
to switch tabs like using ‘Alt+tab’ for
switching between open windows in the
taskbar. Switching tabs using the keyboard
is very useful while surfing the Net.

Firefox Security

Block the excecution of unwanted Java/
Java Scripts with NoScript extension

Enabling Java and JavaScript in browsers have some
security problems.. It is possible with Mozilla Firefox to
selectively block web sites with Java and
JavaScript in them.


If you use Firefox as your default
browser, there is an extension that can
be installed in it known as NoScript.
NoScript provides extra protection for your
Mozilla Firefox browser. This extension
allows JavaScript and Java execution only
for trusted domains of your choice (for
example, your home-banking web site). This
whitelist based pre-emptive script blocking
approach prevents exploitation of security
vulnerabilities with no loss of functionality.
Enable JavaScript/Java execution for
sites you trust with a simple left-click on
the NoScript status bar icon or by using the contextual
menu for easier operation in the popup
status bar-less windows.
You can get this addon by clicking
on “Tools | Extensions | Get more
extensions” or directly from
'https://addons.mozilla.org/firefox/722/ '

Enhancing Firefox functionality

I’ve been using Firefox for a while now
and am really addicted to its extensible
architecture where I can add the feature I
need. There are plenty of cool extensions that we
can use to truly beef up the functionality
of Firefox and take our Internet experience
clear into the geek domain.Read on to digg out
some useful extensions.

Firefox lends itself to extending its
functionality using a range of tiny plug-ins
called extensions. There are extensions
for several applications such as FTP, AD
blocking, mouse gestures, weather and
stock updates, enhanced download
functionality, etc. Some of the must-have
extensions you need to make your Firefox
installation into a power web browser are:

Adblock: Besides speeding up your
web browsing experience, this plug-in
eliminates all web advertising from the
web pages your browse through. It works
by referencing a list of known advertising
web sites and selectively blocking content
from these sites which appear on other
pages in the form of banner Ads, popups,
etc. The list can be modified to incorporate
future inclusions as well.

All-in-One Gestures: Once you start using
it, there’s no looking back—using your
mouse, you can define specific movement
patters to execute tasks during your web
browsing experience. This enables you to
virtually control your surfing using just the
mouse, where you can browse through
pages, navigate between open web sites,
close web sites and move forward and
backward within them with just a flick of
your wrist.


Tabbrowser Preferences: Tab browsing
is one of the best pieces of functionality
in Firefox. This extension extends this
functionality by giving you greater control
on how tabs appear, where they appear
and how links within them are handled.

FoxyTunes: For all you music junkies out
there, how would you like to control your
MP3 player software from your browser
itself? FoxyTunes lets you do just that—it
hooks into popular MP3 players like iTunes
and Windows Media Player and offers full
audio control from a toolbar in the browser
itself. Very handy.

IEView: There are some web sites that
aren’t Firefox-friendly. For these, you can
open them in a dedicated window using
this extension.

Google Toolbar for Firefox: It’s been
around for a while, but this version is
now officially released and supported
by Google. This Google-enabled Firefox
extension lets you search from within the
interface itself.

Gmail Notifier: Just like your local
e-mail client, this extension provides a
notification each time you receive mail on
your Gmail account. Neat

Flashblock: If you’re bogged down by
those Flash-heavy web sites that slow
down your surfing experience, this
functionality banishes them to digital
oblivion!

Ultimate Browsing feature you find only in Mozilla Firefox-- Caret Browsing

Ultimate Browsing feature you find only in Mozilla Firefox


By activting caret browsing you can select text on webpages by only using your keyboard. Activating caret browsing is very simple, yet very useful in some times.



|| Open a webpage which you wish to select the text.
|| Press F7 to enable caret browsing.
|| In the dialouge box that apperas select 'Yes' to proceed with activation.
|| A blinking cursor will appears on your webpage. You can move your cursor using the keyboard arrow keys. To select press 'shift' key while moving.

Busting pop-up ads

Pop-ups are annoying ads that open when you browse some websites. Some popups are malicious that if they are links to some virus infected files. Read on to keep away from irritating popups.

|| Click on Tools -----> Options and select 'content' tab.
|| Click on th checkbox near 'Block pop-up windows'.
|| Click OK.
OK .You are done by Blocking all popups. But what about allowing them from trusted sites. There is also way to set this.

|| Click on the exceptions button that is parellel to the 'Block pop-up windows'
|| Add the URL you want to allow popups and ckick on 'Allow ' . After adding sites one by one click on the 'Close' button.

Backing up Firefox settings and preferences

We are in the process of moving from home to other places and some times surfing internet in public cafes.
There is a tweak to get all settings in your public PC exactly as it in your home PC. ie; all your Firefox settings such as themes, bookmarks,
extensions and customizations are portable.


A superb program called MozBackup
packages all your essential Firefox and
Thunderbird settings: bookmarks, mail,
contacts, history, extensions, cache etc.
Download the program from 'http://
mozbackup.jasnapaka.com/'. Install the
program and run it. Pick your Mozilla
program and your user and choose “Backup
a profile.” You will be able to password-
protect your backup file. Please note that
you can’t run Firefox when you’re backing
up. When you’re done, the resulting .pcv
file will contain all your settings. Email the
file to your account and download it on
your new computer. Install MozBackup on
your new computer and run it. Now choose
the option “restore a profile”. This should
set your Firefox in the same way you had it
on your old computer.


Is this idea helpful to you guys. Stay in touch with Mozilla Firefox . For reading more posts visit back to
http://firefoxstuffs.blogspot.com

Open a link in a new tab in Mozilla Firefox using MOUSE

Open a link in a new tab in Mozilla Firefox using MOUSE


It’s known that in Mozilla Firefox you can
open a link in a new tab by clicking the
link with the ‘ctrl’ key pressed. But there is
a quicker way. If you have a three-button
mouse, you can click a link with the middle
button (in a scroll mouse, the scroll wheel
is also a middle button) to open it in a
new tab.

Change Your Firefox to more than a browser

For Firefox Addons click here

Now Look for Firefox 3 Beta 5

Download Firefox 3 Beta 5

Firefox 3 Beta 5 is a developer preview release of Mozilla's next generation Firefox browser and is being made available for testing purposes only.

These beta releases are targeted to Web developers and our testing community to gain feedback before advancing to the next stage in the release process. The final version of Firefox 3 will be released when we qualify the product as fully ready for our users. Users of the latest released version of Firefox should not expect their add-ons to work properly with this beta.

Please see below for an extensive list of features and enhancements found in Firefox 3 Beta 5, as well as known issues and frequently asked questions. As always, we appreciate your feedback either through this feedback form or by filing a bug in Bugzilla.

What's New in Firefox 3

Firefox 3 is based on the Gecko 1.9 Web rendering platform, which has been under development for the past 32 months. Building on the previous release, Gecko 1.9 has more than 12,000 updates including some major re-architecting to provide improved performance, stability, rendering correctness, and code simplification and sustainability. Firefox 3 has been built on top of this new platform resulting in a more secure, easier to use, more personal product with a lot more under the hood to offer website and Firefox add-on developers.

[Improved in Beta 5!] Firefox 3 Beta 5 includes more than 750 changes from the previous beta, improving stability and web compatibility, providing platform and user interface enhancements, and resulting in the fastest Firefox ever. Many of these improvements were based on community feedback from the previous beta.

More Secure

• One-click site info: Click the site favicon in the location bar to see who owns the site and to check if your connection is protected from eavesdropping. Identity verification is prominently displayed and easier to understand. When a site uses Extended Validation (EV) SSL certificates, the site favicon button will turn green and show the name of the company you're connected to. (Try it here!)
• Malware Protection: malware protection warns users when they arrive at sites which are known to install viruses, spyware, trojans or other malware. (Try it here!)
• New Web Forgery Protection page: the content of pages suspected as web forgeries is no longer shown. (Try it here!)
• New SSL error pages: clearer and stricter error pages are used when Firefox encounters an invalid SSL certificate. (Try it here!)
• Add-ons and Plugin version check: Firefox now automatically checks add-on and plugin versions and will disable older, insecure versions.
• Secure add-on updates: to improve add-on update security, add-ons that provide updates in an insecure manner will be disabled.
• Anti-virus integration: Firefox will inform anti-virus software when downloading executables.
• Vista Parental Controls: Firefox now respects the Vista system-wide parental control setting for disabling file downloads.
• Effective top-level domain (eTLD) service better restricts cookies and other restricted content to a single domain.
• Better protection against cross-site JSON data leaks.

Easier to Use

• Easier password management: an information bar replaces the old password dialog so you can now save passwords after a successful login.
• Simplified add-on installation: the add-ons whitelist has been removed making it possible to install extensions from third-party sites in fewer clicks.
• New Download Manager: the revised download manager makes it much easier to locate downloaded files, and you can see and search on the name of the website where a file came from. Your active downloads and time remaining are always shown in the status bar as your files download.
• Resumable downloading: users can now resume downloads after restarting the browser or resetting your network connection.
• Full page zoom: from the View menu and via keyboard shortcuts, the new zooming feature lets you zoom in and out of entire pages, scaling the layout, text and images, or optionally only the text size. Your settings will be remembered whenever you return to the site.
• Podcasts and Videocasts can be associated with your media playback tools.
• Tab scrolling and quickmenu: tabs are easier to locate with the new tab scrolling and tab quickmenu.
• Save what you were doing: Firefox will prompt users to save tabs on exit.
• Optimized Open in Tabs behavior: opening a folder of bookmarks in tabs now appends the new tabs rather than overwriting.
• Location and Search bar size can now be customized with a simple resizer item.
• Text selection improvements: multiple text selections can be made with Ctrl/Cmd; double-click drag selects in "word-by-word" mode; triple-clicking selects a paragraph.
• Find toolbar: the Find toolbar now opens with the current selection.
• Plugin management: users can disable individual plugins in the Add-on Manager.
• [Improved in Beta 5!] Integration with Windows: Firefox now has improved Windows icons, and uses native user interface widgets in the browser and in web forms.
• [Improved in Beta 5!] Integration with the Mac: the new Firefox theme makes toolbars, icons, and other user interface elements look like a native OS X application. Firefox also uses OS X widgets and supports Growl for notifications of completed downloads and available updates. A combined back and forward control make it even easier to move between web pages.
• [Improved in Beta 5!] Integration with Linux: Firefox's default icons, buttons, and menu styles now use the native GTK theme.

More Personal

• Star button: quickly add bookmarks from the location bar with a single click; a second click lets you file and tag them.
• Tags: associate keywords with your bookmarks to sort them by topic.
• Location bar & auto-complete: type in all or part of the title, tag or address of a page to see a list of matches from your history and bookmarks; a new display makes it easier to scan through the matching results and find that page you're looking for. Results are returned according to their frecency (a combination of frequency and recency of visits to that page) ensuring that you're seeing the most relevant matches. An adaptive learning algorithm further tunes the results to your patterns!
• Smart Bookmarks Folder: quickly access your recently bookmarked and tagged pages, as well as your more frequently visited pages with the new smart bookmarks folder on your bookmark toolbar.
• [Improved in Beta 5!] Places Organizer: view, organize and search through all of your bookmarks, tags, and browsing history with multiple views and smart folders to store your frequent searches. Create and restore full backups whenever you want.
• Web-based protocol handlers: web applications, such as your favorite webmail provider, can now be used instead of desktop applications for handling mailto: links from other sites. Similar support is available for other protocols (Web applications will have to first enable this by registering as handlers with Firefox).
• Download & Install Add-ons: the Add-ons Manager (Tools > Add-ons) can now be used to download and install a Firefox customization from the thousands of Add-ons available from our community add-ons website. When you first open the Add-ons Manager, a list of recommended Add-ons is shown.
• Easy to use Download Actions: a new Applications preferences pane provides a better UI for configuring handlers for various file types and protocol schemes.

Improved Platform for Developers

• New graphics and font handling: new graphics and text rendering architectures in Gecko 1.9 provides rendering improvements in CSS, SVG as well as improved display of fonts with ligatures and complex scripts.
• Color management: (set gfx.color_management.enabled on in about:config and restart the browser to enable.) Firefox can now adjust images with embedded color profiles.
• Offline support: enables web applications to provide offline functionality (website authors must add support for offline browsing to their site for this feature to be available to users).
• A more complete overview of Firefox 3 for developers is available for website and add-on developers.

Improved Performance

• [Improved in Beta 5!] Speed: improvements to our JavaScript engine as well as profile guided optimizations have resulted in continued improvements in performance. Compared to Firefox 2, web applications like Google Mail and Zoho Office run twice as fast in Firefox 3 Beta 5, and the popular SunSpider test from Apple shows improvements over previous releases.
• Memory usage: Several new technologies work together to reduce the amount of memory used by Firefox 3 over a web browsing session. Memory cycles are broken and collected by an automated cycle collector, a new memory allocator reduces fragmentation, hundreds of leaks have been fixed, and caching strategies have been tuned.
• Reliability: A user's bookmarks, history, cookies, and preferences are now stored in a transactionally secure database format which will prevent data loss even if their system crashes.

Downloading and Installing

System Requirements

Before installing, make sure your computer meets the system requirements.

Downloading Firefox 3 Beta 5

Mozilla provides Firefox 3 Beta 5 for Windows, Linux, and Mac OS X in a variety of languages. You can get the latest version of Firefox 3 Beta 5 here. For builds for other systems and languages not provided by Mozilla.org, see the Contributed Builds section at the end of this document.

Installing Firefox 3 Beta 5

Please note that installing Firefox 3 Beta 5 will overwrite your existing installation of Firefox on Mac OS X and Linux. On Windows, Firefox 3 Beta 5 installs in a new folder. For all systems, you won't lose any of your bookmarks or browsing history, but some of your extensions and other add-ons might not work until updates for them are made available.

Removing Firefox 3 Beta 5

You can remove Firefox 3 Beta 5 through the Control Panel in the Start Menu on Windows, by removing the Firefox application on OS X, or by removing the firefox folder on Linux.

Removing Firefox 3 Beta 5 won't remove your bookmarks, web browsing history, extensions or other add-ons. This data is stored in your profile folder, which is located in one of the following locations depending on your operating system:

For More visit Mozilla