There used to be an addon, “Open tabs from clipboard URLs” but I can’t seem to find it anymore.
The best I find now is, an addon that opens a box, then you paste your URLs in it, then you press a button.
That’s not what I want. I want a toolbar button, I press it, the tabs open.
So that I can opens large blocks of URLs.
Also, I would like another addon which opens large blocks of URLs but does not load them immediately.
I have LoadOnSelect3 for this, but the problem with that one, is that it opens special moz:// pages until you load the tab. And that breaks searching and filtering tabs because the tab title and URL are not the real ones.
You still haven’t answered to the question why, so follow the other general solutions, and I still think something is inherently wrong with your workflow, but for some reason you won’t tell us.
Also search for bookmark managers, you can sync pages with them between browsers.
yeah probably opening the tabs is not the best solution anyways. maybe a python scraper would be an easier solution to whatever problem they have