I think there’s a setting to enable cloud storage, so as long as you’re logged into Firefox Sync/Chrome it can be synced but has to be triggered manually to sync/merge the filter lists.
I've got that set up, but it doesn't seem to work: https://github.com/gorhill/uBlock/wiki/Cloud-storage I've followed the steps carefully a coupe of times, but still no luck. The page does include the caveat "Cloud storage services offered by specific browser vendors have limitations and quirks and are out of the control of uBO" which seems to be the case for me.
> If syncing is enabled, the data is synced to any Chrome browser that the user is logged into. If disabled, it behaves like storage.local. When the browser is offline, Chrome stores the data locally and resumes syncing when it's back online. The quota limitation is 100 KB approx, 8 KB per item. Consider using it to preserve user settings across synced browsers.
Yes, same browser since uBO just uses the `browser.storage.sync` API.[1] The sync storage is quite limited but uBO compresses the data to make the most of the limited storage.