[Bug] Pinned tabs hidden on new tab

[Ellie59]

Abstract

Steps to reproduce

1. Start Firefox with clean profile.
2. Install TST.
3. Pin a tab
4. Open a new tab and visit a web page in it
5. Open a new empty tab
6. Click to the new tab with the web page in it
7. Click to the new empty tab
8. Note that the pinned tab disappears

Similar, but I think not the same: #3479

Expected result

I should always be able to click to my pinned tab from the new tab page

Actual result

The pinned tab is invisible and can't be clicked from the new tab page

Environment

• Platform (OS): Debian Linux
• Version of Firefox: 128.7.0esr
• Version (or revision) of Tree Style Tab: 4.1.3

On a page with a web page in it, the pinned tab is visible

After clicking back and forth to the new tab, the pinned tab is invisible

[piroor]

This is not a bug but a designed behavior with an option. You can deactivate it: TST options => turn "Unlock Expert Options" checked => "Appearance" => "Suppress visual gap of the sidebar contents produced by temporarily shown/hidden toolbars on following cases" => turn "Blank new tabs on Firefox 85 and later" unchecked.

[Ellie59]

Oh, perfect, thank you! That addressed it.