Excellent. Thanks to the developer. but there is a bug when displaying marked containers.
a bug here:
//Iterate over the context we have saved for the site and check off the box

** corrected as below **
for (let columnCounter = 2; ...

Can you design icons for light mode? Thank you.
https://imgur.com/Hl3c9SR

the "open current tab in all containers" dont work for some sites like "https://www.premint.xyz", able to fix? will appreciate it a lot. been using it for other sites which works.

This is helpful for me, but is it possible to add the title of the url instead of showing the full url, thanks.

2022/02/22 update: thanks, updated.

I just needed this! Works perfectly! Thanks

Please add a delay setting. Ex. 1-3 sec between each tab opening

I think the multi-account container-list for open in new'option would includes by authors this as to toggle selection on all the names. That is, "Open Link in New Container Tab"-option will show a toggle selection system. This is betterment, Your nice creation also to do so- I find it my dreams up to date. For certificate expired, container-opener does not work in fx57 yet, only by debug-install'option.
Edited Next: hotfix update fix.xpi have been solved for expired.crt that I found later. Thank you

Thanks for the great addon. It would be great if it is possible to edit existing entry. Currently you have to delete and re-create it if you want to make a change.