Thunderbird firefox polices issue

fredc30 · July 27, 2026, 9:51am

Hi Nixos geeks!!!

This morning, I start my desktop and tried to open thunderbird and firefox. No police anymore, no text like police missing?

Just after an auto update and reboot.

Is someone get the same issue ? for clue before investigate.

Thank you for help.

DocBrown101 · July 27, 2026, 10:57am

There’s already a bug ticket for this:

github.com/NixOS/nixpkgs

firefox: UI renders no text

offen 07:17AM - 27 Jul 26 UTC

drzero42

0.kind: bug

### Nixpkgs version - Stable (26.05) ### Describe the bug After a routine `ni…xos-26.05` update, Firefox renders no text in its chrome UI — tab titles, toolbar, and menus are blank — while web **page content** renders text normally. Thunderbird (which seems to share the Firefox wrapper) is affected the same way: menus, folder pane, and dialog text are blank. I'm on KDE Plasma 6 (Wayland). ### Steps to reproduce 1. On KDE Plasma (Wayland), `nixos-26.05`, update nixpkgs to a revision that includes the recent `firefox/wrapper` changes. 2. Launch Firefox (or Thunderbird). 3. Observe: chrome/UI text is blank; web page content still shows text. ### Expected behaviour Firefox and Thunderbird should render text correctly without having to setup environment variables. ### Screenshots _No response_ ### Relevant log output ```console ``` ### Additional context ### What I found - `firefox-unwrapped` is byte-identical across the working and broken revisions; only the wrapper differs. - In the working build, the Firefox wrapper adds `gsettings-desktop-schemas` and `gtk3` gsettings-schemas to `XDG_DATA_DIRS`. In the broken build, those entries are gone from the wrapper. - My Plasma session does not provide those schemas on `XDG_DATA_DIRS` otherwise, so on this setup they only ever reached the app via the wrapper. - Manually adding those two schema directories back to `XDG_DATA_DIRS` when launching the broken build makes the UI text render correctly again (tested for both Firefox and Thunderbird). I noticed the commit `firefox/wrapper: enable strictDeps` (#540042, backported in #545437) landed in the update window that introduced this for me. I'm not certain it's the cause, but it seemed possibly related since it changes how the wrapper's dependencies are handled. ### Workaround Providing the schemas at the session level restores the text. On NixOS: ```nix environment.sessionVariables.XDG_DATA_DIRS = [ "${pkgs.gsettings-desktop-schemas}/share/gsettings-schemas/${pkgs.gsettings-desktop-schemas.name}" "${pkgs.gtk3}/share/gsettings-schemas/${pkgs.gtk3.name}" ]; ``` ### AI disclosure AI help was used in troubleshooting and creating a workaround, but a real human (me) is filing this issue. ### System metadata - system: `"x86_64-linux"` - host os: `Linux 6.18.40, NixOS, 26.05 (Yarara), 26.05.20260725.f7a2e42` - multi-user?: `yes` - sandbox: `yes` - version: `nix-env (Nix) 2.34.8` - nixpkgs: `/nix/store/xsgr0jkfd5115cvzvh5lqzjnv0bjvwwq-source` ### Notify maintainers @booxter @mweinelt --- **Note for maintainers:** Please tag this issue in your pull request description. (i.e. `Resolves #ISSUE`.) ### I assert that this issue is relevant for Nixpkgs - [x] I assert that this is a bug and not a support request. - [x] I assert that this is not a [duplicate of an existing issue](https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+label%3A%220.kind%3A+bug%22+-label%3A%226.topic%3A+darwin%22+-label%3A%226.topic%3A+nixos%22). - [x] I assert that I have read the [NixOS Code of Conduct](https://github.com/NixOS/.github/blob/master/CODE_OF_CONDUCT.md) and agree to abide by it. - [x] I assert that I have read the [automation/AI policy](https://github.com/NixOS/nixpkgs/blob/master/CONTRIBUTING.md#automationai-policy) and that this issue report complies with it. ### Is this issue important to you? Add a :+1: [reaction] to [issues you find important]. [reaction]: https://github.blog/2016-03-10-add-reactions-to-pull-requests-issues-and-comments/ [issues you find important]: https://github.com/NixOS/nixpkgs/issues?q=is%3Aissue+is%3Aopen+sort%3Areactions-%2B1-desc