1 Mouse shortcuts. Sometimes you’re already using your mouse and it’s easier to use a mouse shortcut than to go back to the keyboard. Master these cool ones:
• Middle click on link (opens in new tab)
• Shift-scroll down (previous page)
• Shift-scroll up (next page)
• Ctrl-scroll up (decrease text size)
• Ctrl-scroll down (increase text size)
• Middle click on a tab (closes tab)
2) Delete items from address bar history. Firefox’s ability to automatically show previous URLs you’ve visited, as you type, in the address bar’s drop-down history menu is very cool. But sometimes you just don’t want those URLs to show up (I won’t ask why). Go to the address bar (Ctrl-L), start typing an address, and the drop-down menu will appear with the URLs of pages you’ve visited with those letters in them. Use the down-arrow to go down to an address you want to delete, and press the Delete key to make it disappear.
User chrome. If you really want to trick out your Firefox, you’ll want to create a UserChrome.css file and customize your browser. It’s a bit complicated to get into here, but check out this tutorial.
3) Create a user.js file. Another way to customize Firefox, creating a user.js file can really speed up your browsing. You’ll need to create a text file named user.js in your profile folder (see this to find out where the profile folder is) and see this example user.js file that you can modify. Created by techlifeweb.com, this example explains some of the things you can do in its comments.
4) about:config. The true power user’s tool, about.config isn’t something to mess with if you don’t know what a setting does. You can get to the main configuration screen by putting about:config in the browser’s address bar. See Mozillazine’s about:config tips and screenshots.