1.3 Firefox about:config: examples, Tutorial
Modify entries examples, about:config section
Important note: before starting to modify about:config entries, it is highly recommended to create a copy of the prefs.js file. In case something happens, you may replace this untouched copy with the modified one. Prefs.js file is located in Firefox Profile folder.
Manipulate about:config entries:
- Examples:
- boolean type: 1. browser.tabs.onTop; 2. view_source.syntax_highlight
- string type: 1. browser.newtab.url
- integer type: 1. browser.tabs.closeButtons
Video demonstration Firefox: about:config: examples
1.3 Firefox about:config: examples, Tutorial
min | video details |
---|---|
00:01 | open Firefox |
00:06 | open about:config page |
00:02 | MODIFY PREFERENCES: |
00:11 | BOOLEAN type Example1: browser.tabs.onTop |
00:15 | browser on top: default value is 'true' |
00:17 | test1 ok: indeed, tab position is onTOP |
00:18 | test2 ok: right click, option 'Tabs on Top' ticked |
00:20 | untick option 'Tabs on Top' and note how the value of the preference 'browser.tabs.onTop' turned to false; |
00:22 | once we changed the value of 'browser.tabs.onTop', it became bold and the status is now: 'user set' |
00:14 | test1 ok: indeed, tab position is NOT onTOP |
00:37 | BOOLEAN type Example2: view_source.syntax_highlight |
00:38 | searching for the another preference |
00:41 | view_source.syntax_highlight: default value is 'true'; status: default; font-weight:normal |
00:45 | test ok: the page source syntax is highlighted |
00:55 | back to the preference, double click on it to change its value to: false |
00:57 | test ok: the page source syntax is NO LONGER highlighted |
01:11 | syntax highlighted versus syntax NOT highlighted |
01:25 | get new theme: this is an atipic example; if you want a new theme you will access the Add-ons Manager->Get Add-ons Tab->... but you can do it also by copy/pasting in browser the url found at this setting: 'extensions.getMoreThemesURL' |
01:50 | new theme installed |
02:07 | STRING type Example1: browser.newtab.url |
02:07 | browser.newtab.url: default value is 'about:blank' |
02:09 | test ok: indeed, when opening new tab, a blank page displays |
02:16 | double click on it to display the pop-up window 'Enter string value'; in our case: http://google.com |
02:24 | test ok: indeed, @new tab, google.com page displays |
02:49 | INTEGER type Example1: browser.tabs.closeButtons |
02:49 | browser.tabs.closeButtons: default value is 1 Note: we don't know what the value '1' represents |
02:52 | checking..: 1 means 'Display close buttons on all tabs (Default) |
03:09 | test ok: indeed, on all tabs we have a close button ('x' mark) |
03:12 | let's change the value of the preference 'browser.tabs.closeButtons' to 2 |
03:18 | double click on the preference, type in the new value(2), hit OK button |
03:19 | test ok: no close button on tabs ('x' mark no longer displays) |