mirror of
https://github.com/lhns/steam-frame-nix.git
synced 2026-10-06 03:00:13 +02:00
Pierre Kisters
0d9a238e5a
steamFrame.launchers.<desktop ID> takes the app's own entry (a Flatpak's
export, a Nix package's or a host file) and rewrites only its command lines
(hostEnv, env, flatpakArgs, args, wrappers) and the keys asked for
(mimeTypes, defaultFor, settings), so name, icon, translations and actions
stay the app's and follow its updates.
- Package entries are rewritten at build time; Flatpak/host file entries at
runtime by steam-frame-nix-launchers into
<session.runtimeDir>/steam-frame-nix/applications (tmpfs), on switch, at
login and when Flatpak installs/updates apps (path unit); the Home Manager
links point there.
- keyring.{enable,electron} replaces steamFrame.keyring.{flatpaks,programs}
(clean break: the old options fail with the new form).
- Firefox's launcher is the Flatpak's entry with the profile wrapper in
front (no --profile for the profile manager); Jellyfin's hardware
decoding sets flatpakArgs and env.
- cleanup --all removes the tmpfs entries.
- Check on copies of the real Element, KRDC, Firefox, gedit, Jellyfin and
Claude entries, quoting and generator behaviour.
92 lines
3.9 KiB
Markdown
92 lines
3.9 KiB
Markdown
# Firefox
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`firefox.*`, module `firefox`. Options:
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[README, Options](../README.md#options).
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## Problem
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In the Steam session gamescope never shows fullscreen windows, so Firefox
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looks frozen when a page goes fullscreen; sites send AV1, which the Frame
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decodes in software; the two sessions can't see each other's Firefox,
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so a second instance stops at the locked profile; and without a default
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browser the portal opens links with the first installed `https` handler
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(e.g. Chromium), in both sessions.
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## What you get
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A [launcher](launchers.md) for the Flathub Firefox Flatpak
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(`org.mozilla.firefox`, stable; install it yourself): the Flatpak's own
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entry with a wrapper in front, same ID, so default-browser associations
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keep working.
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- **`vrFullscreenFix`** (on): `full-screen-api.ignore-widgets` makes
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fullscreen fill just the window. Not applied in the desktop profile.
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- **`disableAv1`** (off): `media.av1.enabled = false`. The Frame's decoder
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driver (`iris`) has no AV1, only H.264, HEVC and VP9, so YouTube and co.
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send VP9/H.264, decoded in hardware, instead of software AV1.
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- **`prefs`:** further `about:config` values for every profile; they can
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also override the fixes above.
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- **`desktopProfile`** (`"desktop"`): in the nested desktop the launcher
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uses this separate profile (not for "Open Profile Manager") (a normal Firefox profile with its own browser
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data, created on first use). `null`: the default profile in both sessions.
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- **`defaultBrowser`** (off): the launcher becomes the default for `http`,
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`https` and `text/html` (the launcher's `defaultFor`: Home Manager's
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`xdg.mimeApps`, which then owns `~/.config/mimeapps.list`).
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`prefs` and the fixes are *default* values, not user values: `about:config`
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can still change them per profile, and removing one leaves nothing behind.
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Changes take effect at the next start of Firefox.
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## Configuration
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```nix
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steamFrame.firefox = {
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enable = true;
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disableAv1 = true;
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defaultBrowser = true;
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prefs."browser.startup.page" = 3; # restore the previous session
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};
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```
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## Caveats
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- A `user.js` of your own in the desktop profile is never touched (the
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fullscreen fix then stays on there).
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- A `org.mozilla.firefox.systemconfig` Flatpak extension of your own would
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conflict with the one this module provides.
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- **Remove** `vrFullscreenFix` **when** gamescope shows fullscreen X11
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windows in VR, `disableAv1` **when** a SteamOS kernel adds AV1 to `iris`.
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## How it works
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### Default prefs
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The prefs are written with `pref()`, and nothing goes to `prefs.js`.
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Firefox reads default prefs from `defaults/pref/*.js` in its system config
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dir, which in the Flatpak is `/app/etc/firefox`, the mount point of the
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`org.mozilla.firefox.systemconfig` extension. home-manager provides that
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extension as a link from
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`~/.local/share/flatpak/extension/org.mozilla.firefox.systemconfig/aarch64/stable`
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to a store directory; Flatpak mounts it itself, so the sandbox doesn't get
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`/nix`.
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### Desktop profile
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The launcher's wrapper (`modules/firefox/wrapper.nix`) gets the entry's
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`flatpak run …` command line and, in the nested desktop, adds `--profile
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<desktopProfile>` (not to the profile manager action, `--ProfileManager`).
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The desktop profile undoes the fullscreen fix only while its Firefox runs:
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the wrapper links the
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profile's `user.js` to `/app/etc/firefox/steam-frame-nix-desktop-user.js`
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(a sandbox path) right before starting Firefox, waits for it, and once it
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has exited and the profile is no longer in use removes the link and the
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value Firefox stored from it in `prefs.js`. A second launch that just hands
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a URL to the running Firefox leaves both in place. After a crash, the next
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launch or `steam-frame-nix-cleanup` (on switch) removes them.
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### Older versions
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Older versions linked or copied a `user.js` into every profile; those and
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the values they left in `prefs.js` are removed by `steam-frame-nix-cleanup`
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on switch, for each profile not in use at that moment.
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