LibreWolf can't install addons from Mozilla if ResistFingerprinting is disabled

[awebeer256]

Describe the bug

The Nix build of LibreWolf (package librewolf) changes the substring, "Firefox," to, "LibreWolf," in the browser's user agent string. As a result, addons.mozilla.org believes that your browser is not Firefox, and so it is impossible to install addons normally from that website.

Steps To Reproduce

Steps to reproduce the behavior:

1. Go to about:preferences#librewolf
2. Uncheck the box, "Fingerprinting" -> "Enable ResistFingerprinting"
3. Go to the AMO page for any extension that is not currently installed, e.g. Emoji

Expected behavior

There is a button to install the extension.

Observed behavior

There is the message, "You'll need Firefox to use this extension," and a button to download Firefox.

Screenshots

None provided.

Additional context

This bug was fixed in the LibreWolf team's packages at least a year and a half ago, and I confirmed that it doesn't currently exist in their Flatpak package. I didn't check whether it exists in the librewolf-unwrapped Nix package.

Notify maintainers

@squalus

Metadata

[user@system:~]$ nix-shell -p nix-info --run "nix-info -m"
 - system: `"x86_64-linux"`
 - host os: `Linux 6.1.55, NixOS, 23.05 (Stoat), 23.05.4112.5a237aecb572`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.13.5`
 - channels(root): `"nixos-23.05, nixos-unstable"`
 - channels(<username>): `""`
 - nixpkgs: `/nix/var/nix/profiles/per-user/root/channels/nixos`

[squalus]

Confirmed that this is a problem. I don't know what's causing it.

To work around this, you can set general.useragent.compatMode.firefox to true in about:config

[superherointj]

Fixed by #321083

[sysop84]

Verified this problem is back in LibreWolf-138.0-2-windows-x86_64-portable. Verified problem is not present in LibreWolf-137.0.2-1-windows-x86_64-portable.

Probably a LibreWolf build issue.

[ecomcodeLab]

Its Back on all of my PCS WIndows

and google is not in dark mode anymore if it was set in settings global

noticed that google has alsow a minimal desing. sorry i need the normal

[AntonMeenov]

@sysop84 @badplay

Pretty sure this is related to https://codeberg.org/librewolf/issues/issues/2459