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gorhill / uMatrix

uMatrix: Point and click matrix to filter net requests according to source, destination and type
GNU General Public License v3.0
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uMatrix causing Chrome errors for some HTTPS sites on corporate intranet #934

Closed grepdashv closed 6 years ago

grepdashv commented 6 years ago

Chrome version: 64.0.3282.119 uMatrix version: 1.3.2

When visiting one particular site, Chrome returns the error "ERR_CONTENT_DECODING_FAILED". When visiting a different particular site, Chrome returns the error "ERR_INVALID_RESPONSE". Unfortunately, I cannot give further details about these sites as they are on a corporate intranet. As far as I can tell, the sites are not using frames.

Looking at the logger, there are no blocked items. No per-scope switches are enabled. The intranet domain has been whitelisted. Bypassing the cache does not work. Disabling filtering for the domain scope does not work. Filtering for behind-the-scene scope has not been enabled. Turning off all spoofing/blocking options does not work.

Setting disableCSPReportInjection to true DOES allow the sites to load, so apparently the root cause is something to do with that injection.

gorhill commented 6 years ago

Duplicate of #912.

gorhill commented 6 years ago

Why open a duplicate?

grepdashv commented 6 years ago

While the workaround (disabling injection) is the same, the symptoms are different. The title/scope of #912 does not apply to this issue (since no frames are involved), and it is possible that fixing #912 would not fix this issue. If you're confident that fixing one would fix the other, then perhaps you could broaden the scope of #912 to include the fact that some HTTPS sites are unable to load and simply return Chrome errors (as opposed to showing a garbled page).

gorhill commented 6 years ago

to include the fact that some HTTPS sites are unable to load and simply return Chrome errors (as opposed to showing a garbled page)

This is out of uMatrix control, this is happening inside the browser itself. uMatrix merely inject a CSP header through extensions API, then from there this is in the hand of the browser. The browser parser is not something exposed to extensions.

grepdashv commented 6 years ago

Ah, I see. Sorry for the misunderstanding. In any case, thanks for providing the option to disable that injection.