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 just have the link texts in a text editor one at each line, then select all and drag the selection to tabs toolbar.
But yeah, it does become an issue if you try it with thousands of tabs… It should work, but probably chokes quite a bit.