[Crespyl]

It is a little fiddly to set up at first, certainly.

There are a few tools to make it easier though: if you're dealing with a site that uses a lot of semi-random subdomains (like googlevideo or cloudflare), it's possible to just whitelist the whole domain and get all the subdomains automatically (and then block individual subdomains if you want).

It might be defeating the purpose, but you can also change the "scope" of the changes you make by clicking the blue button in the upper left corner of the panel. You can choose the scope from current domain, current subdomain, or global "*". If you select global, you can, for example, unblock the various youtube/googlevideo related embeds/iframes/xhrs there, and then youtube embeds will work on every site.

The one thing I wish the addon would do is sync my black/whitelists through Firefox Sync so I didn't have to either redo everything on a new computer, or go to the trouble of exporting/importing them.

[drdaeman]

> sync my black/whitelists through Firefox Sync

It's technically possible, although UX is terrible. Go to uMatrix settings, make sure to "enable cloud storage" option is set in the "settings" tab, then manually upload and download rules in the "my rules" tab.

No automatic sync (won't be implemented[1]) and, no merges at the moment (button's broken[2]).

[1] https://github.com/gorhill/uMatrix/issues/467

[2] https://github.com/gorhill/uMatrix/issues/807

[gorhill]

> No automatic sync

By design. Losing all rules because of sync snafu out of control of uMatrix is the absolute worst case. Importing/merging manually will prevent such disaster.

[drdaeman]

Well, if it would be incremental (passing changelists of rule additions and deletions rather than state snapshots), then any serious data loss should be very unlikely. And if deletion log records would contain the deleted records and prunned only after a short while, things could be even rolled back.

As I get it, it would require significant changes to the code, though.

[Crespyl]

Thanks, that's a lot better than what I was doing before.