Unfortunately, uMatrix (the other gorhill project) has bad bugs on Firefox.
When you navigate to another page, it will sometimes get the host for a web request wrong, causing it to apply the wrong rules for that request. This can cause you to lose your login cookies. And since uMatrix has been discontinued, so there's no more central repository to collect bug fixes.
A fork is available called nuTensor which does resolve the cookie clearing problem, but I often see hosts that are not part of the current page (they were from the page I was previously viewing) appearing on the grid.
Huh, so that was why that was randomly happening. Sigh, I totally understand gorhill not wanting to have to support another overlapping tool, but uMatrix is unparalleled for visualizing the sheer mass of privacy vampirism on the modern Web. I've learned a lot from using it on sites, and am now kind of a cottage expert on CDNs thanks to determining the minimum whitelisting to get a site's basic functionality to run.
Do you have an example of how one can test that? Or be more specific? I don’t remember ever encountering any issue like that, but that might simply be because I didn’t know about that bug.
When you navigate to another page, it will sometimes get the host for a web request wrong, causing it to apply the wrong rules for that request. This can cause you to lose your login cookies. And since uMatrix has been discontinued, so there's no more central repository to collect bug fixes.
A fork is available called nuTensor which does resolve the cookie clearing problem, but I often see hosts that are not part of the current page (they were from the page I was previously viewing) appearing on the grid.