Editing configuration

From MozillaZine Knowledge Base

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Mozilla applications are highly customizable, and there are a number of standard ways to change their appearance and behaviour. Basic settings can be changed using the application's dialog boxes. The main Options or Preferences dialogs can be reached from the "Tools" or "Edit" menus. (See menu differences in Windows, Linux, and Mac.)

Extensions and themes provide many additional features and allow you to change the way your application looks.

For more advanced configuration, you should use one of the methods below. (The ChromEdit extension provides a convenient way of editing the configuration files described below. Note that version is not compatible with Thunderbird 1.0.2.)

To modify the way in which Web pages are displayed, you should edit the userContent.css file.

To modify the appearance of the application itself, you should edit the userChrome.css file.

To make changes to the application’s behaviour, you should either edit the user.js file, or use the about:config interface. Note that whilst it is often quicker to use about:config, editing the "user.js" file has the advantage of portability: your settings can be transferred to a different profile, or backed up for safe keeping.

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