Ctrl + Shift + C Should Copy - Firefox Add-On
Add-on stats
Ranking
Other platforms
Add-on summary
Injects a script into pages to intercept Ctrl+Shift+C as a copy command, not allowing it to open Developer Tools.
Concerned about permissions? There is no convenient way at the moment to have Firefox run this extension on every site without "all sites" permission. However, you can look at what the script does, it's minimal. https://github.com/jscher2000/Ctrl-Shift-C-Should-Copy/blob/main/content.js
You also can use an online extension reader to extract the files for review. For example: https://robwu.nl/crxviewer/?crx=https%3A%2F%2Faddons.mozilla.org%2Fen-US%2Ffirefox%2Faddon%2Fctrl-shift-c-should-copy%2F
If you use Greasemonkey, Tampermonkey, Violentmonkey, or FireMonkey, you also could consider using the above file in a user script.
Icon from https://www.iconsdb.com/blue-icons/copy-icon.html.
User reviews
Add-on safety
Risk impact
Ctrl + Shift + C Should Copy requires a few sensitive permissions. Exercise caution before installing.
Risk likelihood
Ctrl + Shift + C Should Copy has earned a fairly good reputation and likely can be trusted.