Change browser.urlbar.trimURLs value by default after instalation.

[lcharles123]

If that is not possible, i suggest you add a popup after instalation the add-on, because many people do not read the description and will install it, test a url and find what does not work.

Thank you! :)

[Rob--W]

Opt-in or opt-out?

[crepererum]

Opt-out.

[fmarier]

That's no longer possible with WebExtensions, unless a new API specifically for this is added to Firefox.