I remember most times having a LOT of tabs on Firefox, and accidentally clicking a video on youtube and switching to a tab that is so far away, and i need to scroll through my entire tabs to find just one that plays the audio (or even more than one!) This is why i figured out to add an option located where you can quickly toggle vertical tabs. It could be named "Find Tabs" or "Tab Cleanup" or something similiar with specific filters like "Playing Audio", "Starting with <website name: for example youtube.com, google.com, yahoo.com etc.>", "Not opened since XX-XX-XXXX" etc. It shows you the tabs in the style you prefer, like in Notepad you use Ctrl+F and find the word in the document directly (so here it navigates the tabbar to the tab that fits the filters) or in a separate control window that pops up like when you show all your downloads but not that big of a window, maybe in the side panel it could fit too, and I think that could be a big QoL feature and time saver especially the more tabs you have open.