Firefox looks squashed when thin or short

[rodrigo-ceccato]

Description
When I resize Firefox below its internal minimum (≈450 × 120), all page content becomes distorted (“squashed”) and mouse clicks register at wrong spots. Other Wayland compositors prevent resizing below that threshold; Hyprland does not. Was previously tracked at issue #3918

---

Steps to reproduce

1. Launch Firefox on Hyprland (still happening on Hyprland 0.48.1 at commit 29e2e59 (version: bump to v0.48.1).
   Date: Fri Mar 28 16:16:07 2025
   Tag: v0.48.1, commits: 5937
   built against:
   aquamarine 0.8.0
   hyprlang 0.6.0
   hyprutils 0.6.0
   hyprcursor 0.1.12
   hyprgraphics 0.1.3

no flags were set).
2. Manually drag to resize the window narrower than 450 px or shorter than 120 px.
3. Observe that content does not reflow correctly and the cursor hitbox is offset.

---

Expected behavior

• Hyprland should respect Firefox’s minimum window size and refuse to shrink below it.
• If below minimum, Firefox should either clamp its content or Hyprland should prevent the resize.

---

Actual behavior

• Window resizes arbitrarily small.
• Firefox content becomes distorted/squashed.
• Mouse clicks land at wrong logical coordinates.

---

Version & system info

• Hyprland version: 0.48.1 at commit 29e2e59
• Distro & kernel: e.g. Arch Linux, 6.12.25-1-lts
• GPU/drm: 4090 laptop

---

Config

Please download and inspect my config:
hyprctl systeminfo -c → attach as a file. Done at attachment.

---

Logs & attachments

config.txt

[ghost]

the size hints are already respected when floating, there is no point in respecting them when tiled due to obvious reasons (windows overlapping, overflowing onto other monitors, etc etc)

anyways whyh would u want to use firefox when its tiny asf?

[rodrigo-ceccato]

It gets squished (and unusable) when it is far from tiny asf. For instance, at 1080p with one vertical split it looks squashed and mouse position is wrong:

that does not happen even at smaller sizes with Sway, Plasma or Gnome, so I think it is a Hyprland bug. Besides, there are plenty of reasons to use it at smaller sizes. For instance, when playing D&D over discord, I open a very thin browser window with some ready-to-click atk formulas. Idk, just a use case, but there are many.

[ghost]

for me its atleast 5 (and thats being generous and forcefully splitting explicitly into it) but ig it depends on screen res

[Wolfdv1]

I also experience this, the distortion is somewhat annoying as even two windows split horizontally cause this, but the mouse offset is the most irritating- my laptop screen is quite old and as such a 50/50 split does mean the window is width: 673; height: 731 - but this is above the 'firefox min size' and the behavior is different in other DEs - never squishing or causing the mouse offset.

I would not mind the distortion as much but the mouse positioning is quite irritating, testing with Zen browser and it occur but only at smaller sizes, I can have three vertically (around 440 width ea) and no distortion or mouse issues occur. So something about the main firefox ui makes it worse.

It does not occur at all with vivaldi, so is something specific to firefox/gecko:

So - unsure if it is Gecko not behaving as expected/standard or the compositor treating something about gecko based browsers different.

[bodison]

I've got an alternative approach to this, it's been bugging me too for a while.

I figured out how to change the minimum window width for Firefox instead. This is my nix file for home manager:

{
  ...
}:

{
  programs.firefox = {
    enable = true;
    profiles.default = {
      id = 0;
      name = "Default";
      settings = {
        "toolkit.legacyUserProfileCustomizations.stylesheets" = true; # enable userChrome.css
      };
      userChrome = ''
        /* Reduce minimum window width for firefox */
        :root:not([chromehidden~="toolbar"]){
          min-width: 20px !important;
        }
      '';
    };
  };
}

Does this help?

[ghost]

no this is jsut trying to work around the problem

[bodison]

Yes, it certainly is working around the problem. With this you can make it so firefox behaves like many other windows without minimum sizes. And no distorted mouse coordinates.

Hope you find a solution to set min width and height for a window. (Something I hope remains off per default, because I wouldn't want a program dictate how small I'm allowed to make its window)

[ghost]

99999999999999999% of applications have minimum sizes, there is no point in turning it off for 1 if all others still have constraints

• the problem is clearly with hyprland™️

[rodrigo-ceccato]

This does help get around while a proper fix doesn't land, at least on firefox since I dont want to switch to chrome-based stuff

[ghost]

this is a pretty serious issue for people with smol screens

can this be promoted to an issue @vaxerski since it has 6 updoots

[alepez]

My screen isn't small (2560x1440) and I have this issue too.

here the width is 998 and firefox looks pretty stretched and mouse clicks are off too.

Window 5b553a01c3d0 -> Firefox looks squashed when thin or short · hyprwm/Hyprland · Discussion #10355 — Mozilla Firefox:
        mapped: 1
        hidden: 0
        at: 1609,314
        size: 998,1397

[vaxerski]

#10515