Thanks for the feedback.

I'd really like to re-add the feature ... but at the moment the browsers history API does not track the tabIds or containerIds of history Items ... so deleting history entries is basically a "guessing game" ... The removed function used a very crude timing based approch which was unreliable because of browser internal delays ... Potentially it could either not delete entries or in a situation where a temp container and a non-temp container had the same url open could even delete the history not belonging to the temp container.

After many attempts to fix/workaround this ... i heavy hearted gave up and removed the feature, since i could not live with my own failure ... i mean did not want my addons to be responsible for potential data lose. ;)

If mozilla changes the browser history API or someone show me a way how to reliably map the history Items to the container tabs (pull request are welcome!!!) i'll re-add this feature gladly.

Note: This issue is as old as time itself ... i mean as the original "Temporary Container" addon (by stoically (rip)) which even now i think still has a big red warning on its setting page trying to explain this problem. So i am not exactly holding my breath here ... if guys who are way smarter than me did not find a solution.