Vertical Tabs on FF 136.0

[vvgfx]

Turning on the vertical tabs newly introduced in FF 136.0 doesnt collapse the sidebar when clicking on the collapse button

Reproduction steps:
Steps to reproduce the behavior:

1. Turn on vertical tabs
2. Click on the collapse sidebar button
3. Sidebar briefly attempts to close before turning on again

Screenshot:

Firefox Version : 136.0

Additional context
I know this works with the sidebar extension, but default support would be nice as the extension does not preview the page on hover, while the in-built implementation does

[amnweb]

Yeah, native support is coming. I have not been using vertical tabs, but I will work on it.

[Starry-AXQG]

In addition, there is another problem, in vertical TAB mode, the shape of the TAB page is still the same in the non-vertical TAB case, and it looks a little unattractive.Can you notice the difference between the shadows of the two buttons in the screenshot below?

[Starry-AXQG]

I want to say yes, I have been following this project! In the latest nightly release, the user profile using this css project already collapse the sidebar, but it shows some exceptions (left). You can compare the normal folds of the sidebar (right).

[Starry-AXQG]

Turning on the vertical tabs newly introduced in FF 136.0 doesnt collapse the sidebar when clicking on the collapse button

Reproduction steps: Steps to reproduce the behavior:

1. Turn on vertical tabs

2. Click on the collapse sidebar button

3. Sidebar briefly attempts to close before turning on again

Screenshot:

Firefox Version : 136.0

Additional context I know this works with the sidebar extension, but default support would be nice as the extension does not preview the page on hover, while the in-built implementation does

Go to C:\Users\user\AppData\Roaming\Mozilla\Firefox\Profiles\ProfilesName\chrome\toolbar,open tabbar.css and search ".tabbrowser-tab:is([visuallyselected]".Delete the area where the property value is located,that's useful.This section controls the width of the TAB page