March 17, 20242 yr After installing Armbian_23.2.1_Rock-5b_bookworm_legacy_5.10.160_xfce_desktop.img I found a nagging error each start of Firefox. "Failed to read the configuration file. Please contact your system administrator." Looking at internet with Google I found hardly any link referring to linux or armbian, therefore I still don't know which configuration file was actually missing or damaged. The only link I found with armbian in it contained some very obscure editting of some configuration files (just like many proposed Windows solutions). The issue: where does it go wrong? The problem is some configuration clutter somewhere in /usr/lib/firefox-esr. And how to solve? A Windows video showed a user removing and reinstalling firefox. Reinstalling with a blank configuration really does solve this problem (try as root or use sudo): apt --purge remove firefox-esr rm -rf /usr/lib/firefox-esr apt install firefox-esr I guess only users who don't use a minimal image may encounter this problem.
April 3, 20242 yr Author Just saw the "mark as solution" tab. Basically when posted this issue was already solved. If it is not against policy I do like to post if only to document.
April 2, 20251 yr Just go to /usr/lib/firefox-esr/defaults/pref and delete any files except channel-prefs.js
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