It's astounding that there has been no response from any Firefox dev to this frequently requested feature after 4 years. I have to clone the Firefox app and make use of private browsing fairly often in order to crudely replicate the features of the m...
You can select all then share them then copy to clipboard, they'll be saved as just text instead of an html file though. But at least you won't lose them.
Found this after updating and discovering this meaningless removal of a useful feature. I found a workaround of creating a collection and using select all to add all open tabs then using the share button in the collection to copy to clipboard. Why tu...