8 reasons to ditch Chrome and switch to Firefox

plat1098 said:
Confirmed loading delay for Dark Reading but here, it was the Strict setting in Firefox that was causing the delay. Changing it to Standard and the page loaded within about a second with Trace and uBO enabled (minimal settings above default) It seems this is Firefox's setup for Strict settings:

View attachment 267880

I saw on the GitHub page your issue was marked as "closed," SeriousHoax.
Click to expand...
Yeah, it's the "Tracking content" in Strict or Custom mode causes this. Disabling it works.
1657058064151.png
SecureKongo said:
I am using Firefox with Strict settings and couldn't reproduce the delay. I also think that it could be related to uBlock Origin, as I don't have the issue with AdGuard extension.
Click to expand...
That's weird because everyone but you can reproduce it. I can even reproduce it even if I disable uBO and only use Firefox with Strict/"Tracking content" turned on.
Don't why the issue is not present in Adguard because there is nothing special in the log.
 
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I disabled uBlock Origin and let ETP run on custom with everything enabled, Tracking content set to all windows and cookies to block all 3rd parties.

ETP enabled: delayed webpage rendering. Browser hints it's done loading, but the website is blank for 4 seconds.
ETP disabled: Same result as with it enabled, however the page remains blank for half that time (2s).

Pressing F5 and CTRL+F5 makes loading the page instant after that, till I empty the browser cache for that website manually using the padlock.
 
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rain2reign said:
I disabled uBlock Origin and let ETP run on custom with everything enabled, Tracking content set to all windows and cookies to block all 3rd parties.

ETP enabled: delayed webpage rendering. Browser hints it's done loading, but the website is blank for 4 seconds.
ETP disabled: Same result as with it enabled, however the page remains blank for half that time (2s).

Pressing F5 and CTRL+F5 makes loading the page instant after that, till I empty the browser cache for that website manually using the padlock.
Click to expand...
Due to Yuki's suggestion, the filter rule has been updated, and now the site works properly even with tracking protection set to Strict.
 
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SeriousHoax said:
That's weird because everyone but you can reproduce it. I can even reproduce it even if I disable uBO and only use Firefox with Strict/"Tracking content" turned on.
Click to expand...
I could reproduce it but the cause was µBO filters and not FF Strict setting. It's weird that different users are having different experiences.
 
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I ditched Firefox because of its ugly UI and moved to Chrome and also Edge.
 
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Especially in a Debian-based Linux environment, where an Apparmor profile can be created for Firefox.

Code: 
# Last Modified: Fri Feb 17 16:35:13 2023
#include <tunables/global>

/opt/firefox/firefox {
  #include <abstractions/audio>
  #include <abstractions/base>
  #include <abstractions/openssl>
  #include <abstractions/postfix-common>
  #include <abstractions/python>
  #include <abstractions/totem>
  #include <abstractions/ubuntu-browsers.d/ubuntu-integration>
  #include <abstractions/ubuntu-konsole>

  capability sys_admin,

  ptrace trace peer=/opt/firefox/firefox,

  /etc/*.types r,
  /etc/mailcap r,
  /opt/firefox/firefox-bin mrix,
  /opt/firefox/libnspr*.so mr,
  /opt/firefox/libplc*.so mr,
  /opt/firefox/libplds*.so mr,
  /opt/firefox/pingsender mrix,
  /opt/firefox/plugin-container mrix,
  /proc/cpuinfo r,
  /proc/filesystems r,
  /proc/meminfo r,
  /proc/sys/dev/i915/perf_stream_paranoid r,
  /run/pulseaudio-enable-autospawn r,
  /sys/devices/pci0000:00/0000:00:02.0/device r,
  /sys/devices/pci0000:00/0000:00:02.0/revision r,
  /sys/devices/pci0000:00/0000:00:02.0/subsystem_device r,
  /sys/devices/pci0000:00/0000:00:02.0/subsystem_vendor r,
  /sys/devices/pci0000:00/0000:00:1d.2/0000:0?:00.0/vendor r,
  /sys/devices/pci0000:00/0000:00:1d.?/0000:0?:00.0/class r,
  /sys/devices/pci0000:00/0000:00:1d.?/0000:0?:00.0/device r,
  /sys/devices/pci0000:00/0000:00:1d.?/0000:0?:00.0/vendor r,
  /sys/devices/pci0000:00/0000:00:1f.4/class r,
  /sys/devices/pci0000:00/0000:00:??.?/class r,
  /sys/devices/pci0000:00/0000:00:??.?/device r,
  /sys/devices/pci0000:00/0000:00:??.?/vendor r,
  /sys/devices/system/cpu/cpu0/cache/index?/size r,
  /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq r,
  /sys/devices/system/cpu/present r,
  /usr/bin/lsb_release mrix,
  /usr/bin/python?.? ix,
  /var/lib/flatpak/app/org.mozilla.Thunderbird/x86_64/stable/**/*.desktop r,
  /var/lib/flatpak/exports/share/applications/*.cache r,
  /var/lib/flatpak/exports/share/icons/*/*.cache r,
  /var/lib/flatpak/exports/share/icons/*/*.theme r,
  /{media,mnt,opt,srv}/** mr,
  owner "/home/*/.config/BraveSoftware/Brave-Browser/Local State" r,
  owner "/home/*/.config/google-chrome/Local State" r,
  owner "/home/*/.mozilla/firefox/Crash Reports/InstallTime*" r,
  owner "/home/*/.mozilla/firefox/Crash Reports/pending/*.extra" rw,
  owner /**/ rw,
  owner /home/*/.Xauthority r,
  owner /home/*/.cache/event-sound-cache.*.*.x86_64-pc-linux-gnu rwk,
  owner /home/*/.cache/fontconfig/*.cache-* r,
  owner /home/*/.cache/mesa_shader_cache/??/* r,
  owner /home/*/.cache/mesa_shader_cache/index rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/**/*.vlpset rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/*.*.json r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/*/*.vlpset r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/.startup-incomplete rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/*.tmp rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/*/* rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/??_* rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/entries/* rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/index rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/safebrowsing-updating/*.sbstore rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/safebrowsing-updating/google4/*.metadata rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/safebrowsing-updating/google4/goog-phish-proto.metadata rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/safebrowsing/*.sbstore r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/safebrowsing/*/*.metadata r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/settings/**/*.ftl r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/*.*.little rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/*.*.lz4 r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/*.bin rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/scriptCache-child-current.bin r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/scriptCache-current.bin r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/urlCache-current.bin rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/urlCache.bin rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/thumbnails/*.png rw,
  owner /home/*/.config/*.dirs r,
  owner /home/*/.config/*.list r,
  owner /home/*/.config/dconf/user r,
  owner /home/*/.config/gtk-3.0/*.css r,
  owner /home/*/.config/gtk-3.0/assets/*.svg r,
  owner /home/*/.config/gtk-3.0/gtk.css r,
  owner /home/*/.config/gtk-3.0/settings.ini r,
  owner /home/*/.config/pulse/cookie rk,
  owner /home/*/.fonts/*.TTF r,
  owner /home/*/.fonts/*.otf r,
  owner /home/*/.fonts/*.ttf r,
  owner /home/*/.fonts/.uuid r,
  owner /home/*/.local/share/applications/*.desktop r,
  owner /home/*/.local/share/applications/*.list r,
  owner /home/*/.local/share/icons/*/*.cache r,
  owner /home/*/.local/share/icons/*/*/*/*.svg r,
  owner /home/*/.local/share/icons/Tela-dark/*.theme r,
  owner /home/*/.mozilla/firefox/firefox-mpris/*.png rw,
  owner /home/*/.mozilla/firefox/*.default-release/**/*.info r,
  owner /home/*/.mozilla/firefox/*.default-release/**/*.safe.bin rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.*.lz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.*.mozlz4 r,
  owner /home/*/.mozilla/firefox/*.default-release/*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.db rwk,
  owner /home/*/.mozilla/firefox/*.default-release/*.js rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.json rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.jsonlz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/*.sqlite-journal rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.sqlite-wal rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.txt rw,
  owner /home/*/.mozilla/firefox/*.default-release/.parentlock wk,
  owner /home/*/.mozilla/firefox/*.default-release/bookmarkbackups/*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/compatibility.ini r,
  owner /home/*/.mozilla/firefox/*.default-release/crashes/*.*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/crashes/*.*.mozlz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/**/*-*-*-*-* rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/**/newtab rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/**/pageload rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/*.json rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/aborted-session-ping rw,
  owner /home/*/.mozilla/firefox/*.default-release/extensions/\{9b19c459-2eb7-4bfe-b3ac-fb798b4bea5e\}.xpi r,
  owner /home/*/.mozilla/firefox/*.default-release/extensions/uBlock0@raymondhill.net.xpi r,
  owner /home/*/.mozilla/firefox/*.default-release/gmp-widevinecdm/*/*.json r,
  owner /home/*/.mozilla/firefox/*.default-release/gmp-widevinecdm/*/libwidevinecdm.so mr,
  owner /home/*/.mozilla/firefox/*.default-release/gmp/Linux_x86_64-gcc3/gmp-widevinecdm/**/salt rw,
  owner /home/*/.mozilla/firefox/*.default-release/lock rw,
  owner /home/*/.mozilla/firefox/*.default-release/minidumps/*.dmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/prefs.js rw,
  owner /home/*/.mozilla/firefox/*.default-release/saved-telemetry-pings/*-*-*-*-* rw,
  owner /home/*/.mozilla/firefox/*.default-release/sessionstore-backups/*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/sessionstore-backups/*.baklz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/sessionstore-backups/*.jsonlz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**.final rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/*.sqlite rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/*.sqlite-wal rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/.metadata-v2 rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/.padding rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/usage rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++** rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++*.com/.metadata-v2 rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++*.com/.metadata-v2-tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++*/*/*.marker rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++*/*/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++*/*/*.sqlite-journal rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++*/*/.padding rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/moz-extension+++**.files/*/?? rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/moz-extension+++**/*.files/?? rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/moz-extension+++**/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/moz-extension+++*/.metadata-v2 rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/permanent/chrome/*/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/storage/permanent/chrome/.metadata-v2 r,
  owner /home/*/.mozilla/firefox/*.default-release/weave/*/*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/weave/*/*.json rw,
  owner /home/*/.mozilla/firefox/profiles.ini r,
  owner /opt/firefox/fonts/** mrw,
  owner /proc/*/cgroup r,
  owner /proc/*/gid_map rw,
  owner /proc/*/maps r,
  owner /proc/*/mountinfo r,
  owner /proc/*/oom_score_adj rw,
  owner /proc/*/setgroups rw,
  owner /proc/*/smaps r,
  owner /proc/*/stat r,
  owner /proc/*/statm r,
  owner /proc/*/status r,
  owner /proc/*/task/*/comm r,
  owner /proc/*/task/*/stat r,
  owner /proc/*/uid_map rw,
  owner /home/*/Documents/*.csv rw,
  owner /home/*/Documents/*.csv.tmp rw,
  owner /home/*/Documents/*.html rw,
  owner /home/*/Documents/*.jpg rw,
  owner /home/*/Documents/*.pdf rw,
  owner /home/*/Documents/*.png rw,
  owner /home/*/Documents/*.ppt rw,
  owner /home/*/Documents/*.tmp rw,
  owner /home/*/Documents/*.txt r,
  owner /home/*/Documents/keepass-key.key r,
  owner /home/*/Documents/logins-updated.xlsx r,
  owner /home/*/Documents/logins-updated.xlsx.asc r,
  owner /home/*/Documents/opt.*.* rw,
  owner /home/*/Documents/terabyte_*.exe rw,
  owner /home/*/Downloads/*.*.txt rw,
  owner /home/*/Downloads/*.html rw,
  owner /home/*/Downloads/*.pdf rw,
  owner /home/*/Downloads/*.png rw,
  owner /home/*/Downloads/*.webp rw,
  owner /home/*/Downloads/opt.* rw,
  owner /home/*/Pictures/*.jpg rw,
  owner /home/*/Pictures/*.webp rw,

}

Code: 
# Last Modified: Fri Feb 17 16:01:22 2023
#include <tunables/global>

/usr/bin/firefox {
  #include <abstractions/audio>
  #include <abstractions/base>
  #include <abstractions/bash>
  #include <abstractions/totem>
  #include <abstractions/ubuntu-browsers.d/ubuntu-integration>
  #include <abstractions/ubuntu-konsole>

  capability sys_admin,

  /etc/*.types r,
  /etc/mailcap r,
  /opt/firefox/firefox px,
  /opt/firefox/firefox-bin mrix,
  /opt/firefox/libnspr*.so mr,
  /opt/firefox/libplc*.so mr,
  /opt/firefox/libplds*.so mr,
  /proc/cpuinfo r,
  /proc/filesystems r,
  /proc/meminfo r,
  /proc/sys/dev/i915/perf_stream_paranoid r,
  /run/pulseaudio-enable-autospawn r,
  /sys/devices/pci0000:00/0000:00:02.0/device r,
  /sys/devices/pci0000:00/0000:00:02.0/revision r,
  /sys/devices/pci0000:00/0000:00:02.0/subsystem_device r,
  /sys/devices/pci0000:00/0000:00:02.0/subsystem_vendor r,
  /sys/devices/pci0000:00/0000:00:02.0/vendor r,
  /sys/devices/system/cpu/cpu0/cache/index?/size r,
  /sys/devices/system/cpu/cpufreq/policy0/cpuinfo_max_freq r,
  /sys/devices/system/cpu/present r,
  /usr/bin/dash ix,
  /usr/bin/firefox r,
  /var/lib/flatpak/app/org.mozilla.Thunderbird/x86_64/**/*.*.*.desktop r,
  /var/lib/flatpak/exports/share/applications/*.cache r,
  /var/lib/flatpak/exports/share/icons/*/*.cache r,
  /var/lib/flatpak/exports/share/icons/*/*.theme r,
  /{media,mnt,opt,srv}/** mr,
  owner "/home/*/.config/BraveSoftware/Brave-Browser/Local State" r,
  owner "/home/*/.config/google-chrome/Local State" r,
  owner "/home/*/.mozilla/firefox/Crash Reports/InstallTime*" r,
  owner /**/ rw,
  owner /home/*/.Xauthority r,
  owner /home/*/.cache/event-sound-cache.*.*.x86_64-pc-linux-gnu rwk,
  owner /home/*/.cache/fontconfig/*.cache-* r,
  owner /home/*/.cache/mesa_shader_cache/??/* r,
  owner /home/*/.cache/mesa_shader_cache/index rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/**/*.vlpset r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/*.*.json r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/.startup-incomplete w,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/*.tmp rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/*/* rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/??_* rw,
  owner /home/*/.cache/mozilla/firefox/*.default-release/cache2/index w,
  owner /home/*/.cache/mozilla/firefox/*.default-release/safebrowsing/*.sbstore r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/safebrowsing/*/*.metadata r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/settings/**/*.ftl r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/*.*.little r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/*.*.lz4 r,
  owner /home/*/.cache/mozilla/firefox/*.default-release/startupCache/*.bin rw,
  owner /home/*/.config/*.dirs r,
  owner /home/*/.config/*.list r,
  owner /home/*/.config/dconf/user r,
  owner /home/*/.config/gtk-3.0/*.css r,
  owner /home/*/.config/gtk-3.0/*.ini r,
  owner /home/*/.config/gtk-3.0/assets/*.svg r,
  owner /home/*/.config/pulse/cookie rk,
  owner /home/*/.fonts/*.TTF r,
  owner /home/*/.fonts/*.otf r,
  owner /home/*/.fonts/*.ttf r,
  owner /home/*/.fonts/.uuid r,
  owner /home/*/.local/share/**/*.theme r,
  owner /home/*/.local/share/applications/*.desktop r,
  owner /home/*/.local/share/applications/*.list r,
  owner /home/*/.local/share/icons/*/*.cache r,
  owner /home/*/.local/share/icons/*/*/*/*.svg r,
  owner /home/*/.mozilla/firefox/*.ini r,
  owner /home/*/.mozilla/firefox/firefox-mpris/*.png rw,
  owner /home/*/.mozilla/firefox/*.default-release/**/*.info r,
  owner /home/*/.mozilla/firefox/*.default-release/**/*.safe.bin rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.*.lz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.*.mozlz4 r,
  owner /home/*/.mozilla/firefox/*.default-release/*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.db rwk,
  owner /home/*/.mozilla/firefox/*.default-release/*.ini r,
  owner /home/*/.mozilla/firefox/*.default-release/*.js rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.json rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.jsonlz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/*.sqlite-journal rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.sqlite-wal rw,
  owner /home/*/.mozilla/firefox/*.default-release/*.txt rw,
  owner /home/*/.mozilla/firefox/*.default-release/.parentlock wk,
  owner /home/*/.mozilla/firefox/*.default-release/crashes/*.*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/crashes/*.json.mozlz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/**/*-*-*-*-* rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/**/newtab rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/**/pageload rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/*.json rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/datareporting/aborted-session-ping w,
  owner /home/*/.mozilla/firefox/*.default-release/extensions/\{9b19c459-2eb7-4bfe-b3ac-fb798b4bea5e\}.xpi r,
  owner /home/*/.mozilla/firefox/*.default-release/extensions/uBlock0@raymondhill.net.xpi r,
  owner /home/*/.mozilla/firefox/*.default-release/gmp-widevinecdm/*/*.json r,
  owner /home/*/.mozilla/firefox/*.default-release/gmp/Linux_x86_64-gcc3/gmp-widevinecdm/**/salt rw,
  owner /home/*/.mozilla/firefox/*.default-release/lock w,
  owner /home/*/.mozilla/firefox/*.default-release/saved-telemetry-pings/*-*-*-*-* rw,
  owner /home/*/.mozilla/firefox/*.default-release/sessionstore-backups/*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/sessionstore-backups/*.baklz4 w,
  owner /home/*/.mozilla/firefox/*.default-release/sessionstore-backups/*.jsonlz4 rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage.sqlite-journal rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/*.sqlite-wal rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/**/.metadata-v2 rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/*.sqlite rwk,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++**.final rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++**.sqlite-journal rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++**.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++**/*.marker rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++**/.padding rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++**/usage rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++**/usage-journal rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/https+++*/.metadata-v2-tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/default/moz-extension+++**/*.files/?? r,
  owner /home/*/.mozilla/firefox/*.default-release/storage/to-be-removed**.final rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/to-be-removed/**/.padding rw,
  owner /home/*/.mozilla/firefox/*.default-release/storage/to-be-removed/**/usage rw,
  owner /home/*/.mozilla/firefox/*.default-release/weave/*/*.*.tmp rw,
  owner /home/*/.mozilla/firefox/*.default-release/weave/*/*.json rw,
  owner /home/*/.mozilla/firefox/*.default-release/weave/toFetch/*.json rw,
  owner /opt/firefox/fonts/** mrw,
  owner /proc/*/cgroup r,
  owner /proc/*/maps r,
  owner /proc/*/mountinfo r,
  owner /proc/*/oom_score_adj rw,
  owner /proc/*/smaps r,
  owner /proc/*/stat r,
  owner /proc/*/statm r,
  owner /proc/*/status r,
  owner /proc/*/task/*/stat r,

}

Two profiles enforced for latest Firefox browser:

opt.firefox.firefox
usr.bin.firefox

Running Firefox in a Linux environment enforced with Apparmor will probably be close to bullet proof. No need to use Edge, although I do have Edge enforced with Apparmor as well, but why bother when MV3 is going to severely limit what ad blocking extensions can provide.
 
One thing about FF (and its forks) is that the same addons are slower to update than Chromium due to the approval process by FF. So, security and privacy might be a concern here.

The good thing about FF (and its forks) is that you can adjust granular control through its about:config settings whereas settings using flags is limited in Chromium
 
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