bug: Firefox search engines icons are missing

[jhakonen]

Are you following the right branch?

• My Nixpkgs and Home Manager versions are in sync

Is there an existing issue for this?

• I have searched the existing issues

Issue description

Search engines in Firefox are missing their icons even though I have configured them via home-manager. See screenshot:

Here's my configuration for search engines:

{
  programs.firefox = {
    enable = true;
    profiles.hakonen = {
      search = {
        force = true;
        default = "Kagi";
        engines = {
          "Kagi" = {
            urls = [{
              template = "https://kagi.com/search?q={searchTerms}";
            }];
            iconUpdateURL = "https://kagi.com/favicon.ico";
            definedAliases = [ "@k" ];
          };
          "StartPage" = {
            urls = [{
              template = "https://www.startpage.com/sp/search?query={searchTerms}";
            }];
            iconUpdateURL = "https://www.startpage.com/favicon.ico";
            definedAliases = [ "@sp" ];
          };
          "Noogle" = {
            urls = [{
              template = "https://noogle.dev?term={searchTerms}";
            }];
            icon = ../../assets/noogle.png;
            definedAliases = [ "@nog" ];
          };
          "Nix Packages" = {
            urls = [{
              template = "https://search.nixos.org/packages?query={searchTerms}";
            }];
            icon = ../../assets/nix-packages.png;
            definedAliases = [ "@np" ];
          };
          "Nix Options" = {
            urls = [{
              template = "https://search.nixos.org/options?query={searchTerms}";
            }];
            icon = ../../assets/nix-options.png;
            definedAliases = [ "@no" ];
          };
          "NixOS Wiki" = {
            urls = [{
              template = "https://wiki.nixos.org/w/index.php?search={searchTerms}";
            }];
            icon = ../../assets/nix-wiki.png;
            definedAliases = [ "@nw" ];
          };
          "Bing".metaData.hidden = true;
          "Amazon.nl".metaData.hidden = true;
          "Google".metaData.hidden = true;
        };
        order = [ "Kagi" "Noogle" "Nix Packages" "Nix Options" "NixOS Wiki" "StartPage" ];
      };
    };
  };
}

I further looked into the generated ~/.mozilla/firefox/hakonen/search.json.mozlz4 file and I can see that the _iconURL fields are present and seem to point to correct location. When I start Firefox however, the file changes and the _iconURL fields disappear from the file.

I've attached an archive search.json.mozlz4.zip that contains two versions of my search.json.mozlz4 file:

• search.json.mozlz4.before which is the generated file, Firefox was not running at this point
• search.json.mozlz4.after which was modified by Firefox when I started it

You can see what they contain with commands:

nix-shell -p mozlz4a --run 'mozlz4a -d search.json.mozlz4.before' | nix-shell -p jq --run jq
nix-shell -p mozlz4a --run 'mozlz4a -d search.json.mozlz4.after' | nix-shell -p jq --run jq

EDIT: My Firefox version is 135.0.

Maintainer CC

@kira-bruneau

System information

- system: `"x86_64-linux"`
 - host os: `Linux 6.8.0-1020-oem, Ubuntu, 24.04.2 LTS (Noble Numbat), nobuild`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.24.9`
 - nixpkgs: `/home/hakonen/.nix-defexpr/channels/nixpkgs`

[kira-bruneau]

Oh weird - thanks for catching this @jhakonen! I'll take some time today to look into this.

[kira-bruneau]

Ok, it looks like they dropped support for _iconURL in https://phabricator.services.mozilla.com/D228441 in favour of _iconMapObj. I'll update the docs and include a migration to the new format!