How often do Firefox retire settings in about:config? There are still a bunch of old old settings in there, that you can still change.

Want your Firefox to behave like a 1990s browser with one window per website? You can configure that.

This is what will be the major issue for me. I toggle the right click override option on and off on a very regular basis.

Shift + right click is the shortcut to always go to the browser context menu.. No need to toggle preferences.

Thank you. I'm not familiar with JavaScript but would it be possible for websites to block shift+right click as well?

EDIT: Per this comment [1] holding shift causes Firefox to bypass event handlers, so hopefully that wouldn't be possible.

[1]: https://news.ycombinator.com/item?id=5968919