About:config: Difference between revisions
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==Adding modifying and resetting preferences== | ==Adding modifying and resetting preferences== | ||
To add a new preference, context-click (right-click) anywhere in the list of preferences, select '''New''' then select the type of preference. ''String'' is textual, ''Boolean'' is true-false and ''Integer'' is numerical. | |||
To modify an existing preference, context-click (right-click) on the preference, select '''Modify''' and type in the new value. In some cases, '''Toggle''' will be the selection offered for boolean (true-false) preferences. | |||
To reset a preference to its default value or to remove an added preference, context-click (right-click) on the preference and select '''Reset'''. | |||
==about:config entries== | ==about:config entries== | ||
Revision as of 12:34, 10 September 2005
about:config (one of the special About_protocol_links) lists application preferences read from "prefs.js", "user.js" and from program defaults, many of which are not present in the Options and Preferences dialog. You can use about:config to modify these preferences and to add other "hidden" preferences. Warning: Changing these values can, in rare circumstances, break Mozilla Suite, Firefox, or Thunderbird or cause strange behavior. Only modify these preferences if you know what you are doing.
Opening about:config
- In Firefox and Mozilla Suite, type "about:config" (without quotes) in the Location Bar and press Enter.
- In Thunderbird, use the AboutConfig extension. Starting with Thunderbird 1.5, about:config is accessible from the "Tools" menu (Options > Advanced > Config Editor button).
- There's a version of AboutConfig extension compatible with Nvu here.
Adding modifying and resetting preferences
To add a new preference, context-click (right-click) anywhere in the list of preferences, select New then select the type of preference. String is textual, Boolean is true-false and Integer is numerical.
To modify an existing preference, context-click (right-click) on the preference, select Modify and type in the new value. In some cases, Toggle will be the selection offered for boolean (true-false) preferences.
To reset a preference to its default value or to remove an added preference, context-click (right-click) on the preference and select Reset.
about:config entries
This article contains a list of valid about:config entries and their possible values. (That article is a reference for what each preference does, it is not the place to edit your preferences.)
References
- A brief guide to Mozilla preferences
- MozillaZine Tutorial for about:config — Step by step guide with screenshots.
- Mozilla Help: Editing Configuration files — user site: ilias.ca
- Preferential extension — An extension similar to about:config with extra features, such as documentation for some preferences.
- About protocol links — other about: pages.
