“Extension context invalidated”

Thanks Dmytri!

Does this also happen on other pages?

I think some, let me see if I can find others, I noticed this trying to add pages that failed on bookmark import, let me check others.

so far just that one. Though several others consistently fail to import:

    URL	Errors
https://support.mozilla.org/en-US/questions/1226151 	NetworkError when attempting to fetch resource.
https://bugherd.com/ 	NetworkError when attempting to fetch resource.
https://www.kontxt.io/pricing 	NetworkError when attempting to fetch resource.
https://www.bibsonomy.org/gettingStarted 	NetworkError when attempting to fetch resource.
https://getmemex.com/ 	NetworkError when attempting to fetch resource.
http://quicklinkr.com/ 	NetworkError when attempting to fetch resource.

There is no “Network Error” those sites load just fine and each can be bookmarked via the extension, except that first one.