"Simple Tab Groups" has been an absolute game changer for my workflow. It is a very well thought-out extension that has allowed me to compartmentalize my work activities greatly. I normally have multiple windows open, separated by activity. In fact, I usually have upwards of 6 windows, with each averaging upwards of 20 tabs, for everything from different Jupyter Python projects to researching different topics to general web browsing. It was a nightmare keeping track of which was which, I lived in constant fear of losing papers or web resources I had found or of simply losing the structure I had in those windows, and the associated RAM usage would periodically slow my machines to a crawl. "Simple Tab Groups" has completely solved these issues.

ORGANIZATION: Simple Tab Groups allows you to name groups and, with the setting enabled, display their names in the window title. I can much more easily manage multiple windows by using these two features.

HISTORIES / ORGANIZATION: Tab groups are stored, with customizable backups created daily by default, so that I can quit Firefox or restart my machine and simply reopen the tab group with the tab structure I'd previously tailored. .

MEMORY: When RAM usage becomes an issue, I can simply close groups with the secure knowledge that I can easily reopen those groups when I need them again. There is also a specific option to save RAM when tabs are hidden, but I haven't found it necessary to use this option. Many of the groups I create are only needed once a week or less. I can now simply keep those windows closed until I come back around to that project, so that my RAM usage now generally stays low.

Finally, this extension also works well with Firefox's "Multi-Account Containers" extension. I have used both together for weeks with zero conflicts on either a Mac or Ubuntu 18. My only concern with this extension is that I am becoming highly reliant on it, and if Drive4ik ceases developing and supporting it, I would be hard-pressed to find a combination of trustworthy (i.e., Mozilla-recommended) tools that work as well as this one extension does. Thank you for your excellent work, Drive4ik! Would love to support you monetarily as well.