Firefox

Windows

Start second Firefox with profile manager:

"C:\Programme\Mozilla Firefox\firefox.exe" -no-remote -ProfileManager

Old versions of firefox seem to need:

SET MOZ_NO_REMOTE=1
"C:\Programme\Mozilla Firefox\firefox.exe" -ProfileManager

OSX

about.config:

  browser.gesture.pince.in — Value = cmd_fullZoomReduce
  browser.gesture.pinch.in.shift — Value = cmd_fullZoomReset
  browser.gesture.pinch.latched — Value = false
  browser.gesture.pinch.out — Value = cmd_fullZoomEnlarge
  browser.gesture.pinch.out.shift — Value = cmd_fullZoomReset
  browser.gesture.pinch.threshold — Value = 40 to 100 (set it to a number that works for you)

References:

• Enabling Pinch Zoom Trackpad Gestures in Firefox

This ist outdated on current versions of firefox, use extension Classic theme restorer instead

To put the tabs bar again down in recent versions of firefox without the respective menu item:

1. Open location “about:config”
2. Search for “browser.tabs.onTop”
3. Toggle to “false” (by doubleclick)

Have fun!

References:

Firefox Tabs wieder unter die Adressleiste

about:config:

browser.urlbar.trimURLs = false

about:config:

browser.fixup.alternate.enabled = false

References:

https://support.mozilla.org/de/kb/suche-ueber-die-adressleiste?redirectlocale=en-US&redirectslug=Location+bar+search#w_url-autovervollstacndigung

Cert

I just encountered the (in)famous “The PKCS 12 operation failed for unknown reasons.” error message while trying to import a personal PKCS#12 certificate and key into firefox 43 or firefox 45 on ubuntu.

As the the import worked on a different firefox profile by the same user account on the same machine as expected, I concluded that the certificat file was okay, but I had some runtime or configuration issue within firefox.

While neither finding helpfull information on the web nor some means to do analytic troubleshooting, I just started to try out things.

In the end, it turned out that starting firefox without my previously opened tabs allowed me to import the certificate in question.

So some of my opened tabs did prevent installing a personal certificat into firefox … - WTF???

httpsredirect

about:config:

browser.fixup.fallback-to-https = false

References:

Answer to "Firefox always sets address to https"

It may happen, that firefox replaces http by https when trying to reach a site. I susspect, this happens, when there has been a redirect to https before (or even you just used the site with https before). However, if http and http content do not mach - or even if there is a problem with the https site- you'd prefer to access the http URL. Alas, the following steps seem to work:

1. Select “Clear resenct history …” from the “History” menu
2. Unselect everything but “Site Preferences”
3. (Meaning, select “Site Preferences” if not selected already)
4. Select an apropriate time window (i.e. when you visited the site in question the last(? first?) time)

References:

• Firefox redirects to https - Stack Overflow

GTK

After some Update, checkboxes on webpages were not visible any more. Utilizing my favourite web search enging¹⁾ made me realize other people had the problem too. In my case (running XFCE under Ubuntu 16.04) the solution was to start XFCE-Theme-Manager²⁾, select tab controls and switch from Orion to Murrina-Tangoesque.

References:

• Archlinux: Invisible checkboxes in Firefox 43.0.1?

• Enable separate search field in browser bar
• Navigate to dict.leo.org
• Klick magnifying glass in search field and then on the LEO Symbol with the green plus sign

— peter 24.10.2024 12:05 CEST

SSLCert

security.enterprise_roots.enabled = true

Source: ChatGPT, verified by existing about:config entries.