Based on our record, Tab Stash seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
I like the the https://josh-berry.github.io/tab-stash/ extension. Not exactly what you want, but IMO a very well-done extension in that space. Firefox handle lots of tabs very well though since the tabs are lazily loaded. Only issue is that the session system once in a while mess up and you lose everything. - Source: Hacker News / over 1 year ago
If you need vertical tabs, my new favorite solution is Tab Stash in the sidebar. Source: over 2 years ago
Visual Tabs - Visual Tabs is a Firefox add-on, which enables to show tabs as thumbnails in sidebar. Key features are...
OneTab - Whenever you find yourself with too many tabs, click the OneTab icon to convert all of your tabs into a list. When you need to access the tabs again, you can either restore them individually or all at once.
Sidebery - Manage your tabs and bookmarks in sidebar.
Tabs Outliner - Next Generation Session, Windows, Tabs Manager and a TooManyTabs Solution That Really Works.
Tree Style Tab - Tree Style Tab is an all-in-one Firefox extension that provides ability in order to operate tabs as a tree.
SplitUp! - A fun and elegant tab manager