[Firefox] All requests classified as behind-the-scene

[covoe]

Fresh install of Firefox 34.0 and uMatrix 0.9.0.2-dev.1 with default rules.

All requests are classified as "behind-the-scene" in the "other" column, according to the log:

Requests are correctly classified in Firefox 35.0.1.

[gorhill]

I could fix the behind-the-scene issue, but that uncovered another issue that all request types ends up as other with FF 34 and below, which render uMatrix rather useless.

uBlock was dealing with the issue by having messaging across processes, which is something I completely removed in uMatrix, as this was causing too many requests to be spuriously labelled as behind-the-scene (see #165).

Also synchronous messaging across processes is discouraged for e10s -- this may lead to the warning about CPOW slowing down the extension. I could experiment with bringing back that cross-process messaging for FF versions older than 35, but really, I don't think the amount of effort to support FF 29-34 is worth it, I rather put effort is better supporting FF35+.

So for now I will just mark uMatrix as being compatible with FF35+.

[gorhill]

Fixed with 1f4ba9d.