About:Config Profiles in Mozilla Firefox
A World Wide Web of browsing fun awaits Firefox users who discover and use the power of about:config. Every Firefox user has a profile that Firefox configures by default. By finding your Firefox about:config page and tweaking values there, you can enhance your browsing experience and make Firefox work the way you want it.
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FIrefox Profiles
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Firefox stores everything it knows about you in a folder named "Mozilla" on your hard drive, which contains a folder that holds a file named "prefs.js." This file has the actual preferences that determine how your version of Firefox looks and works. The about:config profile page simply allows you to view the preferences stored in that file and update them using a friendly graphical user interface that contains menus and controls. You have the ability to create multiple Firefox profiles on one computer. Each profile resides in a unique folder. Any changes you make to about:config while using one ID does not affect the other.
About:config Page
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About.config is not a URL, but when you type it into the browser's address bar, a warning button that states "I'll be careful, I Promise" appears. Clicking this button displays your about:config profile page. Dozens of Firefox preferences appear in a table that contains multiple columns. The "Preference Name" column identifies the preference and the "Value" column shows its current value. A "Type" column displays the type of data a preference stores and the "Status" column displays "user set" if you or an add-on has changed a preference's value.
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Changing Profile Settings
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If you know a few letters in the name of a preference you wish to find, type those letters in the "Filter" text box. As you type, Firefox displays preferences that contain your search query. Right-clicking a preference and clicking "Modify" opens a popup window that allows you to change the preference's value. You can also create new preferences by clicking "New" instead of "Modify" in the popup window. If you double-click a preference that has a value of true, it changes to false; if it is false, it changes to true. Be careful when double-clicking preferences, as changes take place immediately and there is no "Save" button.
Profile Tweaks
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If you would like your "Backspace" button to scroll up the page instead of going back a page, set the value of "browser.backspace_action" to "1" instead of "0." If you prefer to click links and open them in new tabs, set the value of "browser.link.open_newwindow" to "1"; to make new links appear in new tabs, set the value to "3." Changing the value of "browser.search.openintab" from "false" to "true" causes search results to open in a new tab when you enter a search query in Firefox's search box. Browse the Internet for other about:config tweaks that can help you tailor Firefox to your needs.
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