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Irregular requests to a blocked site #713
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You will need to make a much better report, it's laking the "make the case" part -- and lacking a whole lots of details, like all the settings in uMatrix. It's also lacking all the "ruling out" steps. Did you rule out that the network requests were made by other extensions? Did you rule out the network requests were from behind-the-scene (for which matrix filtering is not enabled by default)? Etc. Make the case -- this forces people to challenge their own conclusions before opening an invalid issue. |
So, as I had wrote, firefox extensions are unrelated (all disabled except uMatrix). uMatrix rules:
Site with quite unique blocked contents to test:
Tested on different Operation systems. |
and sorry, but I have no idea what "behind-the-scene" requests means... |
I followed your steps 1-3 above, and I could see If you have other sites with similar steps, that would help. |
It's tricky, I know :-) I was not sure about the bug for a months. So I haven't file it earlier. More people will watch it, better chance to find it, so people, please... |
I could reproduce other instances. Typical output from wireshark:
I did check that I further tested and I could reproduce instances while the dev console for the page was opened with the Network tab in "Persistent log" mode, and this points out toward a Firefox issue: while wireshark was showing the above, there was no matching instances of connections reported in the Network pane by Firefox. I also tried with the browser console, and same result. In summary, Firefox appears to be establishing connections to these servers without going through its extensions API, or despite the network requests having been cancelled through the extensions API. It also appears to maybe be related to in-memory browser cache -- not sure though. |
I can reproduce pretty consistently with Firefox. I haven't been able to reproduce with Chromium. This reinforces that this is a Firefox-specific issue. |
@gorhill Did you try with |
@gorhill Please untag "invalid" for this issue. |
For
See: https://sitecheck.sucuri.net/results/www.lidl.cz#sitecheck-details |
When I do action like "go backwards" or "reload current page" than uMatrix doesn't work (irregulary). I can not figure it out for a couple of months, but it happens. I see it in my outgoing network connections log (firewall), that Firefox make requests to a sites blocked in the uMatrix. Usually it is a google-analytics.com, googletagmanager.com etc.
Sadly I cann't define and describe it properly here, like a proper bug report. But it is something to look at for a developers and give attention, because it is a data leak.
How to reproduce it:
Tech. info:
I use uMatrix 0.9.3.6 with referrer and UA spoof.
And Firefox 45 with Javascript: enabled; Cookies: enabled; Java: disabled; Plugins: none; Extensions: many, but tested as unrelated to the problem; Cache: enabled.
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