Blurred fonts on ultrawide monitor full screen

[lantgabor]

Captchas

• [x] I have read the instructions.
• [x] I have searched existing issues and avoided creating duplicates.
• [x] I am not filing an enhancement request.
• [x] I have checked that this issue cannot be reproduced on Mozilla Firefox.
• [x] I have checked that this issue can be reproduced once I removed all my Mods and Custom CSS.

What happened?

Noticed that the wider the screen above 16:9 aspect ratio the worse this blurring gets! Noticed that if I click anywhere on the screen the blur sometimes disappears (depending on the page)! (note: Im not clicking on any interactive elements just an empty div on the page) If I refresh the page (f5) the blur is not present unless I scroll, but after scrolling it stays blurry. Issue is not present in current latest firefox build! -- zen only issue!

This issue is present in both Windows 11 24H2 and on Linux under Wayland

Fullscreen (5120x1440) Same page but windowed mode (approx. 2560x1440)

How to reproduce: Strech zen window way beyond 16:9 aspect ratio, effect is amplified by the width of the window.

Version

1.12.5b (Firefox 138.0.3) (64-bit)

What platform are you seeing the problem on?

Windows - x64

What component is this issue related to?

Other

Relevant log output if applicable

[Propheticus]

Does this help: https://github.com/zen-browser/desktop/issues/6302#issuecomment-2764052368 ? instead of step 3, you can also use a zen.theme.content-element-separation of 0

[lantgabor]

1, Setting zen.view.experimental-rounded-view to false fixes the blur unless you scroll, after scrolling it is blurry again on some pages (e.g: https://zen-browser.app/whatsnew) but it remains blurry in about:config 2, zen.theme.content-element-separation to 0 fixes the issue but now the window has no borders.

Rounded-view = false, content-element-separation = 8 (default)

Rounded-view = false, content-element-separation = 0

[sebastianillges]

#8396

[dosubot[bot]]

Hi, @lantgabor. I'm Dosu, and I'm helping the desktop team manage their backlog. I'm marking this issue as stale.

Issue Summary:

• The issue involves blurred fonts in the Zen browser on ultrawide monitors, not present in Firefox.
• You confirmed a workaround by setting zen.view.experimental-rounded-view to false and zen.theme.content-element-separation to 0, which resolves the blurring but removes window borders.
• @Propheticus suggested configuration changes, and other users like @ximian and @ilham-agustiawan supported the solution.
• @sebastianillges referenced a potentially related issue, #8396.

Next Steps:

• Please let me know if this issue is still relevant to the latest version of the desktop repository by commenting here.
• If no updates are provided, the issue will be automatically closed in 7 days.

Thank you for your understanding and contribution!

[ximian]

As of version 1.14b, changing zen.view.experimental-rounded-view to false and zen.theme.content-element-separation to 0 doesn't fix the issue for me. I'm using a Linux flatpak version. OS: Pop!_OS 22.04 Screen resolution: 5120x1440

[Propheticus]

zen.view.experimental-rounded-view is no longer doing anything, btw. (see the dustbin icon next to it, which means it's now seen as a custom flag.) I think even in the previous 1.13.2b it was not.

[dnlwlnc]

Same issue in MacOS. Here Zen next to the Firefox:

[dnlwlnc]

Same issue in MacOS. Here Zen next to the Firefox:

Found an issue. It was the Bleeding Corners Fix mod.

[dosubot[bot]]

Hi, @lantgabor. I'm Dosu, and I'm helping the desktop team manage their backlog and am marking this issue as stale.

Issue Summary:

• You reported blurred fonts in Zen browser fullscreen on ultrawide monitors across Windows, Linux, and macOS.
• Workarounds involving disabling zen.view.experimental-rounded-view and adjusting zen.theme.content-element-separation helped but removed window borders.
• These workarounds no longer function in recent versions, as noted by other users.
• The blur issue was linked to the "Bleeding Corners Fix" mod.
• The issue remains unresolved and was previously marked stale pending updates.

Next Steps:

• Please let me know if this issue is still present in the latest version of the desktop repository by commenting here.
• If I don’t hear back within 7 days, I will automatically close the issue.

Thanks for your understanding and contribution!

[dnlwlnc]

It's still an issue with the "Bleeding Corners Fix" mod. Without the mod, everything looks fine.

Regards, Daniel

czw., 14 sie 2025 o 18:03 dosubot[bot] @.***> napisał(a):

dosubot[bot] left a comment (zen-browser/desktop#8421) https://github.com/zen-browser/desktop/issues/8421#issuecomment-3188998049

Hi, @lantgabor https://github.com/lantgabor. I'm Dosu https://dosu.dev, and I'm helping the desktop team manage their backlog and am marking this issue as stale.

Issue Summary:

• You reported blurred fonts in Zen browser fullscreen on ultrawide monitors across Windows, Linux, and macOS.
• Workarounds involving disabling zen.view.experimental-rounded-view and adjusting zen.theme.content-element-separation helped but removed window borders.
• These workarounds no longer function in recent versions, as noted by other users.
• The blur issue was linked to the "Bleeding Corners Fix" mod.
• The issue remains unresolved and was previously marked stale pending updates.

Next Steps:

• Please let me know if this issue is still present in the latest version of the desktop repository by commenting here.
• If I don’t hear back within 7 days, I will automatically close the issue.

Thanks for your understanding and contribution!

— Reply to this email directly, view it on GitHub https://github.com/zen-browser/desktop/issues/8421#issuecomment-3188998049, or unsubscribe https://github.com/notifications/unsubscribe-auth/AE2Q4BTNYZ3TG3FXDKVX4XD3NSXONAVCNFSM6AAAAAB5NLU3WKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTCOBYHE4TQMBUHE . You are receiving this because you commented.Message ID: @.***>

[dirodriguezm]

I managed to fix this running with MOZ_ENABLE_WAYLAND=1

EDIT: Nope that did not fix it, but as weird as it sounds, if I maximize the Zen window on top of a different application it is fixed as well. I only see the blurry text when Zen is the only application in the workspace. I'm using GNOME with multiple workspaces.

EDIT2: As someone mentioned before. The issue was related to rounded corners. After disabling rounded corners the problem is fixed. My previous suggestions were not correct.

[dosubot[bot]]

Hi, @lantgabor. I'm Dosu, and I'm helping the desktop team manage their backlog and am marking this issue as stale.

Issue Summary:

• You reported blurred fonts in Zen browser 1.12.5b on ultrawide monitors when stretching beyond 16:9, affecting Windows and Linux Wayland.
• Workarounds like disabling zen.view.experimental-rounded-view and adjusting zen.theme.content-element-separation initially helped but caused other issues and stopped working in later versions.
• The blur was linked to the "Bleeding Corners Fix" mod, confirmed by multiple users including on macOS.
• Recent comments indicate disabling rounded corners resolves the blur, but a proper fix is still pending.

Next Steps:

• Please let me know if this issue is still relevant with the latest version of the Zen browser by commenting here to keep the discussion open.
• Otherwise, I will automatically close this issue in 10 days.

Thanks for your understanding and contribution!

[othyn]

Still an issue

[simonsmith]

If it helps I've been struggling with this exact issue for a long time on Firefox - so possibly not related to Zen directly

[CarsonBurke]

setting zen.theme.content-element-separation to 0 fixed it for me. No active mods. Using niri, Wayland, on RTX 5000 series.