Support forcing light style

[rugk]

As explained in the Readme and in the descriptions etc. of AMO, we can only try to force websites to have a dark style.

We cannot force a light style, mostly, as most websites won't use prefers-color-scheme: light.

[rugk]

Blocked by https://bugzilla.mozilla.org/show_bug.cgi?id=1547818

[sbrl]

I think this might be my bug. I've got the prefers-color-scheme: dark enabled via ui.systemUsesDarkTheme = 1 (I think that's the property name? I can't remember), so when I try to use this extension, nothing happens - since it can't unset the dark theme setting.

[rugk]

Yes, of course, it only can force the dark mode. So what is your concern here?

[sbrl]

I was falsely under the impression that it could toggle dark mode, regardless of whether I had it set by default or not.

I'll just sit subscribe to this bug (and the Bugzilla one on the FF bug tracker) for updates.

[rugk]

Yep, thanks. You'll see that the API(s) does not really allow this.

I tried to make it very clear in the add-on description etc. that it actually is not possible to force a light style. (for many websites, at least, as likely no one uses prefers-color-scheme: light on their site)

[sbrl]

I must have missed that description. I do have a peristent problem whereby I don't fully read the middle of sentences etc..... :P

[rugk]

Hi, I have great news for you! According to my testing, the latest v2.0 release fixes this issue due to the way it now uses a completely new API to do "dark-mode-changing" "properly". For more information, please see the release notes. If the issue should not be fixed, please let me know.