In my desktop Firefox I use Cookie Autodelete to keep a whitelist of sites whose cookies won't be deleted. All other cookies are deleted as soon as all tabs for a particular site are closed.
Android's Firefox, from what I gather, only give you two choices: delete all cookies upon quitting (not tab closing), or save them across sessions.
Unfortunately the extension above does not work on Firefox Android, and I haven't found any other alternatives.
Do you know of any alternatives or other solutions, to get a behaviour similar to the desktop one? (And also: how come that extension is not supported on Firefox on Android?)
Cheers!
I use cookie autodelete on Android, you might need to use nightly or fennec for full extension support. (And then you have to use extension "collections" for some stupid reason, but it does work)