Tooltip when mouse-overing a tab has no background fill, completely transparent background

[Dwedit]

Describe the bug

This is one is new for Firefox 126.

When you mouseover a tab, you normally get a tooltip. The tooltips are broken at the moment, instead of having an opaque background, it is missing any opacity at all, resulting in black text on a completely clear background.

Expected behavior

Should have a fill style defined for the tooltip (the same color as the toolbar and tab)

Screenshots

OS

Windows 10

OS - Others

No response

Firefox Version

126.0

Distribution

• Original Lepton
• Lepton's photon style
• Lepton's proton style

Theme

• Light
• Dark
• Alpenglow (System: Light)
• Alpenglow (System: Dark)
• System Default
• Others: (e.g. Photon Colors, Google Chrome Dark, Fairytale Of Nature)

Theme - More Info

No response

user.js setup

Tested on a fresh profile with just those files extracted.

Additional context

No response

[erwin4270]

I tested this using Firefox Color.

If the toolbar color alpha (toolbar) of the theme is 0%, it's transparent.

In the latest Nightly, if the popup background alpha (popup) of the theme is 0%, it's transparent

[black7375]

@erwin4270 Thanks. This should make reproduction very easy, thanks for the comment.
I'll try to fix the bug over the weekend.

[black7375]

Fixed to base the color of the panel(popup) instead of the toolbar.
(Same setting like nightly)

[walking-octopus]

Fix still not ported to Photon.

Reproduced on latest master.

[fraencko]

Can confirm that the issue is there on Windows 11, Firefox 126.0.1, Photon and Proton style, latest master.

[tml3nr]

It's ok when i rollback v8.6.0.

Windows 10, Firefox 127.0 32bit, Lepton v8.6.0.

[Dwedit]

This issue seems to no longer happen in Firefox 127.0.2?

[black7375]

Probably. I've also applied a patch to fix the issue.
Try to new release.

• https://github.com/black7375/Firefox-UI-Fix/releases/tag/v8.6.2