Is it possible to load userContent.css with PWAs?

[AlbusPercivalDumbledore]

@filips123 I'm trying to style a website I've now installed as PWA with usercontent.css, but I'm unable to do the same. In stock firefox, userContent.css is placed inside the chrome folder in target profile. Where do I place userContent.css for PWAs I've created?

Also, I'd like to modify browser chrome to my liking as well. Can userChrome.css be used for the same?

[filips123]

PWA profiles are in

• Windows: %APPDATA%\FirefoxPWA\profiles\
• Linux: $XDG_DATA_HOME/firefoxpwa/profiles/ or $HOME/.local/share/firefoxpwa/profiles/
• macOS: $HOME/Library/Application Support/firefoxpwa/profiles/

The default profile is 00000000000000000000000000, other profiles will also have similar identifiers. To access about:config to enable CSS modifications, you can press F6 inside a PWA and then enter about:config.

userChrome.css may also work, but it may also conflict with some other modifications done by PWAsForFirefox itself.

[AlbusPercivalDumbledore]

@filips123 Thanks a lot!

Was an oversight on my part. I had enabled css modifications with a user.js file, yet wasn't copying over all the css files from existing firefox installation. userChrome.css too works as intented, except when at conflict with existing mods, as you mentioned.

One more question, if you don't mind. Would it be possible to load some userchromejs scripts as well? (I've been using some from https://github.com/aminomancer/uc.css.js)

[filips123]

Loading userchromejs scripts is harder because PWAsForFirefox also uses userchromejs and has to register its own loader. In theory, you could edit C:\Program Files\FirefoxPWA\userchrome\runtime\_autoconfig.cfg to include fx-autoconfig's loader, but the problem is that this file will be overwritten on every PWAsForFirefox update. But I have one idea how I could improve this in the future.

[AlbusPercivalDumbledore]

Could be something to do with my own install then. I've created 3 PWA profiles, installed uBO on all of them, and each one of them crashed when overwriting uBO settings. Peculiarly, it doesn't happen when importing settings for other extensions. Doesn't even create a crash log. Here's a gif:

file will be overwritten on every PWAsForFirefox update. But I have one idea how I could improve this in the future

That'd be great.

Thanks, again!

[filips123]

I found why importing uBO settings crashes. It doesn't actually crash...

When uBO imports settings, it closes its tab. However, because in PWA there is only one tab opened, it will close the whole window. I think your settings should still be imported when you reopen PWA though. I agree this is weird, but considering settings are imported and there is not much I can do, I'll leave it as is.

[filips123]

In fc34860, I added support for loading third-party UC scripts without changing main PWAsForFirefox loader. You will need to save fx-autoconfig's loader as YOUR-PROFILE/chrome/user/boot.jsm and it should be automatically loaded. This will be available in the next release.

[AlbusPercivalDumbledore]

When uBO imports settings, it closes its tab. However, because in PWA there is only one tab opened, it will close the whole window.

Ah, that makes sense. Yeah, settings get imported alright.

Thanks a ton for script support!