Tearing doesn't work in Firefox

[phonetic112]

Already reported ? *

• I have searched the existing open and closed issues.

Regression?

No

System Info and Version

System/Version info

Hyprland 0.45.2 built from branch  at commit 12f9a0d0b93f691d4d9923716557154d74777b0a  ([gha] Nix: update inputs).
Date: Tue Nov 19 21:47:18 2024
Tag: v0.45.2, commits: 5451
built against aquamarine 0.5.0


flags set:
debug


System Information:
System name: Linux
Node name: arch
Release: 6.12.4-arch1-1
Version: #1 SMP PREEMPT_DYNAMIC Mon, 09 Dec 2024 14:31:57 +0000


GPU information: 
09:00.0 VGA compatible controller [0300]: NVIDIA Corporation AD104 [GeForce RTX 4070] [10de:2786] (rev a1) (prog-if 00 [VGA controller])
NVRM version: NVIDIA UNIX Open Kernel Module for x86_64  565.77  Release Build  (archlinux-builder@arch)  


os-release: NAME="Arch Linux"
PRETTY_NAME="Arch Linux"
ID=arch
BUILD_ID=rolling
ANSI_COLOR="38;2;23;147;209"
HOME_URL="https://archlinux.org/"
DOCUMENTATION_URL="https://wiki.archlinux.org/"
SUPPORT_URL="https://bbs.archlinux.org/"
BUG_REPORT_URL="https://gitlab.archlinux.org/groups/archlinux/-/issues"
PRIVACY_POLICY_URL="https://terms.archlinux.org/docs/privacy-policy/"
LOGO=archlinux-logo


plugins:

Description

Also doesn't work on chromium and some other apps (but works on games and stuff like vkcube). I have windowrulev2 = immediate, class:.* and general:allow_tearing = 1 set. Works fine on sway with this config:

output * allow_tearing yes
for_window [all] allow_tearing yes

How to reproduce

1. Add windowrulev2 = immediate, class:.* to config and enable general:allow_tearing
2. Open Firefox and go to https://www.vsynctester.com/ or https://testufo.com/
3. Fullscreen Firefox, reported FPS is still at the monitor refresh rate

Crash reports, logs, images, videos

No response

[vaxerski]

window needs to be solitary for tearing to kick in. Browsers open a subsurface thus hyprland doesn't count them as valid objects to do that.