Why is it's severity set to low?
The browser is completely unusable under Wayland.

The workaround is to launch it with `WAYLAND_DISPLAY= firefox`

Severity should be set to high or critical

Opened a bug report upstream
https://bugzilla.mozilla.org/show_bug.cgi?id=1729718

I have the same problem with firefox 92.0-1 under sway, thanks for the workaround, works like a charm, at least from the terminal. But it doesn't help when launching the firefox via the desktop file and a launcher like e.g. rofi/wofi. I tried changing the Exec line to e.g.
```
Exec=env WAYLAND_DISPLAY= /usr/bin/firefox --private-window %u

```
but this didn't seem to do the trick for me, maybe I'm missing something.

I can live with the terminal method for a while and hopefully this will be fixed soon enough.

could this be some dependencies need to rebuild? hard to believe this is upstream!?

i have the same Problem no context menu, also i notice under llvmpipe (LLVM 12.0.1, 256 bits) as graphic the cpu usage
is higher than normal and stuck sometimes at 100% if you try to open the context menu with right click everywhere.

i'm using GDK_BACKEND=wayland WAYLAND_DISPLAY=wayland0 under sway and firefox with ublock addon.

I can confirm that not only the context menu doesn't work. Firefox is completely unusable under Sway (Wayland). Even the work around didn't work for me. CPU is high, and it's not responsive.

I think the severity should be bumped to high

the work around only disable wayland and use xwayland right?

Weirdly enough, I notice no issues using firefox 92 on sway with the wayland backend. Everything seems to work perfectly well. I am on AMD graphics.

I run firefox from console looking at the printed messages. Opening context menu (which doesn't work) or even hovering on any button like refresh/back/ or the burger button prints this same message non-stopping causing high CPU.

```

(firefox:2126): Gtk-WARNING **: 21:23:44.736: Theme parsing error: gtk-contained.css:2871:228: Missing closing bracket for :not()

```

Googling around suggests that specific locales or themes might cause similar messages. Do you use any non-en_US locales? Special themes? I am using en_US.UTF-8 and about:support mentions

OS Theme Adwaita / Adwaita

I'm using Adapta / Adwaita-dark theme. for the locales I use en_US

@AK(Andreaskem) you're right. it was related to the theme

sway with output scale 2 are affected.

if you use sway with scale 1 everything works as it should.

You are right. I updated my work laptop today. It uses sway with a scale 2 setting and Firefox 92 no longer shows any context menus.

I confirm that context menu doesn't work with scale 2 setting

Patching gtk3 as suggested in this Reddit thread helped me: https://www.reddit.com/r/swaywm/comments/pkw44a/firefox_92_doesnt_render_menus_burger_menu_right/hcap6il?utm_source=share&utm_medium=web2x&context=3

Wayland is not a supported configuration yet and patches will not be added for it