Firefox has a jump-list of frequent used web pages when you right click the Firefox taskbar icon:
This can be disabled as follows.
Type about:config into the address bar and then press Enter.
Note the warning displayed and then click the I’ll be careful, I promise! button to continue.
In the search bar type frequent and then right click on browser.taskbar.lists.frequent.enabled and then click on Toggle from the drop down menu.
The value will change from true to false.
The change will take effect immediately.
If you find that Firefox 4 no longer saves your tabs when you exit this is easily rectified:
Open Firefox and type about:config as the URL and then press enter.
Click the I’ll be careful, I promise button to continue:
Type browser.showQuitWarning in the filter until browser.showQuitWarning is the only item that you see below. Double click browser.showQuitWarning to change it from false to true:
The setting should take immediate effect.
Using Windows a lot has got me in the habit of using the backspace key to go back a page when browsing the internet.
Firefox does not enable this behavior by default in Ubuntu – fortunately it is not too hard to configure.
Open Firefox and then type about:config as the URL and then press Enter. You’ll see a nice large warning:
Click I’ll be careful, I promise to continue.
Type browser.backspace_action in the filter until browser.backspace_action is the only item that you see below.
Double-click on the browser.backspace_action preference and change the default value of 2 to 0 (zero).
This setting will take immediate effect.
Source: My Digital Life