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15 must-have Firefox tricks

December 18, 2007 12:00 PM ET

12. Limit Firefox's use of RAM

Does Firefox use up too much of your RAM? Teach it to behave by limiting the amount of RAM it uses. To do it:

  1. Type about:config into your address bar and hit Enter.

  2. In the Filter text box, at the top of the page, type browser.cache.

  3. Double-click the "browser.cache.memory.capacity" entry.

  4. The default is 50000. If you don't have a lot of memory on your system, for example, between 512MB and 1GB, change the number to 15000 and click OK.

13. Use Firefox keyboard shortcuts

Quit mousing around when you use Firefox -- get work done faster with the following keyboard shortcuts.

General shortcuts
Keyboard shortcut
What it does
Ctrl-D Add bookmarks
Ctrl-B Display bookmarks in the sidebar
Ctrl-J Display downloads
F11 Full screen view
Ctrl-H Display history
Ctrl-P Print
F5 Refresh page

Navigation shortcuts
Keyboard shortcut
What it does
Alt-Left Arrow Back
Alt-Right Arrow Forward
Ctrl-O File Open
F6 Next Frame
Shift-F6 Previous Frame
Alt-Home Go to Home Page
Ctrl-L Go to the Address Bar
Ctrl-K Go to the Search Box
Esc Stop
Ctrl-T Open a tab
Ctrl-W Close a tab
Ctrl-Tab Go to the next tab
Ctrl-Shift-Tab Go to the previous tab
Ctrl- (1-9) Select a specific tab
Alt-F4 Close a window
Ctrl-N Open a new window

Text shortcuts
Keyboard shortcut
What it does
Ctrl-C Copy
Ctrl plus - Decrease text size
Ctrl plus + Increase text size
Ctrl-0 Return to text size default



15 must-have Firefox tricks





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