I can confirm for Firefox. Right click the tab -> Pin Tab. It shows up as a symbol only (hides the title) leftmost tab and never goes away. Here's more info, w

I can confirm for Firefox. Right click the tab -> Pin Tab. It shows up as a symbol only (hides the title) leftmost tab and never goes away. Here's more info, with images of how it looks like: https://support.mozilla.org/t5/Learn-the-Basics-get-started/Pinned-Tabs-keep-favorite-websites-open-and-just-a-click-away/ta-p/18607 https://support.mozilla.org/t5/Learn-the-Basics-get-started/...