Firefox 135 Nightly - Vertical tab Autohide no longer works

[dreadbalaur]

Describe the issue:

The autohide animation no longer works after this update. The sidebar button now toggles between hiding and expanding the vertical tabs. ultima.tabs.autohide now toggles between the collapsed and expanded states of the tabs. Sidebar autohide animation still works.

Platform/Desktop:

• OS: Windows 10 22H2
• Browser Version: Nightly 135 (December 6 update)

[soulhotel]

Will work on it in a day, once I have time to spare.

[dreadbalaur]

No rush. Just figured it's better to notify you asap.

[soulhotel]

So I noticed.. When hovering the vertical tabs with auto-hide on, the sidebar is being unusually forced into its collapsed state. This is scripted inline - into the elements behavior. Which means I can't override it with userChrome.

IDK what firefox developers are aiming for here, but it is pretty frustrating. Maybe this will be doable in a future Nightly update, hopefully this isn't included in the next Firefox versions, I'll keep working at it and see what can be done. Otherwise tab auto-hiding will have to be disabled....

2024-12-11.22-14-55.mp4

[soulhotel]

@jjcortes22 found out that it works when you disable/enable vertical tabs from settings. This works until you restart the Browser.

Vert.tab.issue.mp4

What a headache.

[dreadbalaur]

That's quite frustrating then. Instead of giving us native autohide they tweaked it for... no particular use?

[soulhotel]

Alright... It's a result of the new sidebar splitter. Once the vertical tabs fall below 100px, the sidebar is forced into a collapsed state. This is meant to work hand in hand with the new sidebar splitter that lets you resize the vertical tabs manually. This obviously can't work with autohiding because to autohide, the tabs would need to shrink to the collapsed state as well.

Fortunately there is another way to do Autohiding - by sliding the vertical tabs from left-to-right without manipulating the width. Unfortunately this would also mean completely hiding them when not hovered, instead of the icon only view.

Nightly:

2024-12-11.23-19-35.mp4

I really hope this isn't what I have to do, the collapsing into the icon view is very helpful (visually) but if this is the direction Firefox goes then it will be better than no auto-hiding.

[soulhotel]

That's quite frustrating then. Instead of giving us native autohide they tweaked it for... no particular use?

Yeah..

[soulhotel]

The fix is in. This will all be handled via the nightly.override setting, so have it enabled.

[jjcortes22]

Thank you so much, I will upgrade after a dr appointment.
Is there a way I can dm you? @soulhotel

[soulhotel]

Also, the tabs-width Settings will not work with nightly.override. Vertical Tabs can be resized by turning auto-hiding off, then dragging the sidebar to desired width.

@jjcortes22 Don't think you can on github, what did you want to discuss?