[nextos]

Temporary Containers has an option "Delete no longer needed Temporary Containers" which defaults to 15 minutes, but can also be set to immediate.

Are you setting this option to something else?

Temporary Containers works really well for me. I have per domain isolation, which only breaks very very few sites (Gmail and Outlook 365). For those I have regular persistent containers. Alternatively, I can always open a new private window where I don't have this plugin active.

uBlock Origin + Temporary Containers + ClearURLs are a great setup for privacy and security. Actually, I don't need much else aside from a VPN and a few settings in my user.js.

The only thing I miss is Vimperator. Modern alternatives are full of glitches because of inherent limitations in the WebExtensions API.

[avian]

It's a long-standing bug that also affects me. It's quite annoying since it's easy to irreversibly hose up your sync account by going over the remote storage quota. Maybe you don't have a Firefox account and/or sync setup?

There are related issues opened for Temporary Containers, MAC and Firefox and at least from the public discussions not much is happening about it.

[ringer]

I use Temporary containers heavily and the MAC sync is also enabled but I never see anything like this. Sometimes 1-2 container it remains but I can delete it manually. Maybe I'm lucky with this.

[notdang]

Here is the issue if you are interested. It's still not closed: https://github.com/stoically/temporary-containers/issues/371

[RMPR]

> The only thing I miss is Vimperator. Modern alternatives are full of glitches because of inherent limitations in the WebExtensions API.

Didn't use Vimperator, but I found Tridactyl to be pretty good, especially their hinting mode.