* "It's All Text" can be approximated with "Textern". That one requires Python3.5+ and a (short) manual install.

* "Easy Copy" -> no real replacement. Partial features at https://addons.mozilla.org/en-US/firefox/addon/copy-as-markd... and https://addons.mozilla.org/fr/firefox/addon/url2clipboard/ .

Not affiliated with these in any ways.