Match rules in webextension limited to only few URI schemes

[Ede123]

@ExE-Boss OK, I'm afraid I found an issue with the webextension:
The "matches": ["<all_urls>"] in manifest.json only works for the URI schemes "http", "https", "file", "ftp" and "app".

This fails for example when looking at data URIs.

It's only a minor issue, but as I don't see any real advantage of having a webextension I obviously don't want to sacrifice functionality for it.

[Ede123]

Other obvious example that does not match: about:logo

Not working either: All chrome:// links.

[ExE-Boss]

Sadly, content scripts can't work with about:* or chrome:// links, as those are privileged Firefox pages.
The advantage of having a WebExtension is that it will work in Firefox 57+.
Data URIs don't work because Firefox doesn't inject scripts into those, but support for those might be added if we file a bug at https://bugzilla.mozilla.org.

[Ede123]

Oh come on... Who signed off on all this crap? Why should I want to work with a "secure" browser if it means the browser is unwilling to work with me?

Thanks for clarification, but as it stands that means I'll hold of on any update until there's no way around webextensions anymore.
If they already fail to meet the requirements for an extremely simple add-on like Nicer Media Pages, how should they ever allow anything really useful to be made?

[ExE-Boss]

Update: Firefox Quantum (57) is coming within a week, so it might be a good idea to have the new version submitted to AMO already, so that it can be reviewed and approved in time.