About:config: Difference between revisions
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==Opening about:config== | ==Opening about:config== | ||
* In Firefox and Mozilla Suite, type "about:config" (without quotes) in the Location Bar and press Enter. | * In Firefox and Mozilla Suite, type "about:config" (without quotes) in the Location Bar and press Enter. | ||
* In Thunderbird, use the [http://aboutconfig.mozdev.org/ AboutConfig extension]. Starting with Thunderbird 1.5, about:config is accessible | * In Thunderbird, use the [http://aboutconfig.mozdev.org/ AboutConfig extension]. Starting with Thunderbird 1.5, about:config is accessible via "[[Menu differences in Windows, Linux, and Mac|Tools -> Options]] -> Advanced -> General -> Config Editor (button)". | ||
* | * For [http://www.nvu.com Nvu], there's a compatible version of the AboutConfig extension [http://glazman.org/nvu/releases/extensions/ here]. | ||
==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 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. | ||
Revision as of 07:21, 30 October 2005
about:config (one of the special about: 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 via "Tools -> Options -> Advanced -> General -> Config Editor (button)".
- For Nvu, there's a compatible version of the AboutConfig extension 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. If you added the entry via about:config, the preference will no longer be listed after restarting the program.
See also
- about:config entries — contains a list of valid about:config entries and their possible values. The article is a reference for what each preference does, it is not the place to edit your preferences.
- About protocol links — other about: pages.
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.
