Firefox - Notes and tips about my favorite web browser !!!

• log in my Firefox account
• synchronize settings :
  • bookmarks
  • credentials

• Since we're dealing with company policies, you may have guessed this is about Firefox running on a professional workstation, on Windows (Windows 10, to be exact, even though I don't think it matters here).
• The about:preferences page says :
  Your browser is managed by your organization.
• The about:policies page lists strategies (name / value) :

  DisableFirefoxAccounts	true

1. Windows-r | regedit
2. browse to the key : HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Mozilla\Firefox
   The "source" article linked below points to HKEY_CURRENT_USER\Software\Policies\Mozilla\Firefox but I had no such key .
3. change the value of DisableFirefoxAccounts from 1 to 0
4. no reboot required, just restart Firefox
5. enjoy

• I have XML documents + an XSL stylesheet
• XSLT is supposed to turn XML into HTML (which worked, actually, until a recent Firefox update)
• I'm working locally, so the address bar says file:///path/to/my/file.xml
• Now, I only see the values stored in the XML files

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at file:///path/to/my/stylesheet.xsl. (Reason: CORS request not http).

1. open the about:config page
2. change the privacy.file_unique_origin key to false

1. enter about:config mode
2. toggle security.insecure_field_warning.contextual.enable to false
3. toggle signon.autofillForms.http to true

All the about: pages (source) :

To speed up browsing :

1. Enter the about:config mode
2. Change network.dns.disableIPv6 to true
3. Change network.http.pipelining to true
4. Change network.http.pipelining.maxrequests to 32
5. Change network.http.proxy.pipelining to true
6. Create a new numeric value called nglayout.initialpaint.delay and set it to 0 (zero). This sets the browser's reaction delay when receiving data.
7. Change browser.cache.use_new_backend to 1 (source)
8. restart Firefox to apply changes

To reduce memory usage :

1. Enter the about:config mode
2. Create a new boolean value named config.trim_on_minimize and set it to true
3. restart Firefox to apply changes

Some interesting about:config options :

Files found in the Firefox profile_directory (list) :

• .sqlite files :
  • cookies.sqlite : lists the cookies.
  • downloads.sqlite : information about the downloads (file, date, ...)
  • permissions.sqlite :
    • moz_hosts : white list of sites allowed to install software
  • places.sqlite :
    • moz_bookmarks :
    • moz_historyvisits : (? not clear text)
    • moz_places : (?)
• other files :
  • prefs.js :

Find the profiles directory (Source) :

Create a new profile with the profile manager (Source) :

Launch another Firefox instance using a different profile (source) :

"Install" extensions across profiles :

Backup / restore a profile (source) :

<script type="text/javascript">
	window.onload = function() {
		var currentLocation	= window.location.href;
		var positionOfHashSign	= currentLocation.indexOf('#')

		if(positionOfHashSign >= 0) {
			var targetAnchor	= currentLocation.substr(positionOfHashSign + 1);
			var anchorYPosition	= document.getElementById(targetAnchor).offsetTop;
			window.scrollTo(0, anchorYPosition);
			}
		}
</script>

Using uBlock Origin

Using UserContent.css

1. Type about:config in Firefox address bar
2. Browse to the property called network.protocol-handler.external.mailto and set it to true. If it doesn't exist, create it.
3. Create a new property called network.protocol-handler.app.mailto and enter the path to your mail application. (For example : C:\Program Files\Microsoft Office\OFFICE11\OUTLOOK.EXE).
4. Close and restart Firefox to reload this option.
5. Test it !