If you find that you can't install Grepper on Opera or OperaGX:
first download this extension from the opera extension store https:
then go to the grepper download page on chrome:
https:
Finally, press "add to opera" and then accept the popup that comes up from the first extension installed
You can test to see if grepper is installed and working by searching:
"how to remove last element from a list python" and you should see the grepper box come up
If it's not working, search opera://extensions/ and give grepper permissions to:
"allow access to search page results"