MV3 - Cannot get content script to run in Firefox! No errors and no loglines to be found!?

[juraj.masiar]

Yeah, we all have this problem and it’s a known thing:

[Blog post] Manifest v3 in Firefox: Recap & Next Steps

I think we chatted about this over matrix, but the issue is about host permissions, in MV3, they’re not granted automatically on install, but instead user needs to grant them at some point. Depending on what’s appropriate for your extension, you could ask the user using promise.request() , or they can grant it by going to about:addons, selecting your addon, and flipping the toggle in the permissions tab. We’re also working on an easier UI to do this, tied to your extension browser action, but…

It’s good that you are testing testing MV3, but it’s still way too soon . Many API is still missing and I don’t think you will be able to release MV3 addon this year.

And seeing how fast the development goes, I would say we will be lucky if ESR 114 in September 2023 has a full MV3 support . Not to mention features that Chrome is still working on, like the Offscreen Document.