12 Most Useful FireFox Tips

by on May 12th, 2010

Firefox is more flexible than any browser available and it offers full customization according to your needs whatever the matter be (privacy, browsing, tabs control etc.). Here we will discuss about most useful tips related to firefox.

How to Remove Stored Passwords from Mozilla FireFox

To remove a password you have stored in FireFox do the followings:

erase password remove password techmynd

Remove Passwords from Mozilla Firefox Version 2.0:

Tools > Options > Security > Show Passwords > Remove All

Remove Passwords from Mozilla Firefox Version 1.5:

Tools > Options > Privacy > Passwords > View Saved Passwords

Remove Passwords from Mozilla Firefox Version 1.0:

Tools > Options > Saved passwords > View saved passwords

How to Clear Visited Websites History from the browser

There are a couple of ways to remove visited sites history from Firefox.

To remove all visited websites go to:

Tools > Options > Privacy and select the tab ‘History’.

Click on the button ‘Clear Browsing History Now’.

or Select ‘Never Remember History’ from drop down

To remove specific websites from history use ‘Exceptions’ tab which will be available if you select ‘Use Custom Settings for History’.

How to Make Firefox Default Browser?

You can change default browser settings to Firefox by selecting the following menu:

Tools > Options > Advanced

At the bottom of the menu you’ll see a section marked ‘System Defaults’. To set the default browser to Firefox click the ‘Check Now’ button.

If your computer does not have Firefox as the default browser it will give you the opportunity of changing the default browser to Firefox.

Change the check box of “Always check to see if Firefox is the default browser on start-up”, will tell you next time Firefox isn’t the default browser.

How to Change Images Being Displayed from ‘Fit to Screen’ to the Full Image?
  • Open a new Firefox tab or window
  • Type or copy / paste about:config as the URL in the location bar. You will see a list of configurable settings.
  • Type (or copy/paste) browser.enable_automatic_image_resizing into the filter field.
  • If the value of the browser.enable_automatic_image_resizing field is set to true (default value), images are automatically scaled to fit to the size of your browser window. If the value is false images are shown zoomed 100%, and you’ll see scrollbars to view the remainder of the image.
  • You can easily change the value by double clicking the entry.
Manage Firefox Add-ons

You can manager your add-ons from the menu Tools > Add-ons. Disable or Uninstall any installed add-on from here.

Change the Mozilla Firefox Menu Langauge?

Visit the International versions page and download Firefox in your preferred language. After the download is completed simply reinstall Firefox and the language should be updated.


  • Open a new tab/window
  • Type or copy/paste about:config as the URL in the location bar. You will see a list of configurable settings.
  • Type (or copy/paste) general.useragent.locale into the filter field.
  • Double click the value and enter the language code of the xpi file you installed. If you downloaded en-US.xpi type in en-US.
  • Restart Firefox and you should see the menus in your new language.


Benjamin Smedbergs created a language plugin that adds a menu item to switch between installed languages. If you want to quickly change between languages to test different versions, it could be very useful.

Firefox for Linux or MAC OSX

Mozilla has got support for cross platform and multiple languages. Proceed this page to download custom Firefox for your needs.

Control Firefox Tabs Behaviour

Mozilla FireFox lets you fully control tabs fully.

Select the following options from the menu: Tools > Options > Tabs and check / uncheck what you want.

You can force open new window in new tab.
Force Tabbar to show always and more…

Increase Print Size of Fonts in Mozilla FireFox

To change the print size you have to edit the a file named userContent.css. This file is used to change the appearance of web pages.

The page Editing Configuration Files explains where you can find the file on your system.

The full path of file (in my case) to be changed is as following:

C:/Documents and Settings/[user name]/Application Data/Mozilla/Firefox/Profiles/p2zad4t3.default/chrome

Make a copy of the userContent-example.css file and rename it to userContent.css

Copy and paste the following 6 lines of CSS code to the bottom of the file.

/* Force the use of a x-large size in print */
@media print {
  body {
    font-size: larger !important;

Restart FireFox.

Instead of font-size ‘larger’ you can also use different font sizes such as x-large, xx-large etc.

Adjust Text Size of Fonts in Mozilla FireFox

With Mozilla FireFox it is easy to adjust the text size for websites.

From the FireFox menu select:
View > Zoom and choose Zoom In / Zoom Out / or Reset

Shortcut keys:

Increase Font Size: ctrl +
Decrease Font Size: ctrl –
Normal: Ctrl 0

Scroll wheel: keep the ctrl key down and using the scroll wheel on your mouse to adjust the font bigger and smaller.

How to Save / Transfer Mozilla Firefox Settings and Profiles

Locate the following folder in Windows XP:

C:\Documents and Settings\[user name]\Application Data\Mozilla\Firefox\Profiles\xxxxxx.default

Copy that xxxsomename.default folder and save it somewhere. Paste it in profiles folder of new location or after another fresh firefox install.

Locate the following folder in Windows Vista:

C:\users\[User Name]\AppData\Roaming\Mozilla\Firefox\Profiles\xxxxxxxx.default

Locate the following folder in Windows 95/98/Me:

C:\WINDOWS\Application Data\Mozilla\Firefox\Profiles\xxxxxxxx.default

Locate the following folder in Linux:


Locate the following folder in Mac OS X:

~/Library/Application Support/Firefox/Profiles/xxxxxxxx.default/

Save FireFox Bookmarks

Go to Bookmarks > Organize Bookmarks > Import and Backup > Export HTML

Next time use same way to Import these bookmarks using saved HTML file.