Comment 68 for bug 1741074

(In reply to William Woodruff from comment #10)
> Chiming in as a maintainer of an extension ([ff2mpv](https://github.com/woodruffw/ff2mpv)) that uses native messaging: users have already reported challenges getting the extension to function correctly with the `snap`-ified Firefox distribution in the upcoming Ubuntu LTS release.
>
> Downstream tracking: https://github.com/woodruffw/ff2mpv/issues/80

Following up on this: I'm able to confirm that the extension I maintain works correctly on the "beta" channel of the Firefox snap.

However, to get it working, I had to run a manual `flatpak` command on the terminal:

```
flatpak permission-set webextensions ff2mpv snap.firefox yes
```

Is this documented somewhere? I had to dig through others' bug reports to figure out that this is what I needed, and I can imagine that a lot of other native extension users (and developers) are in a similar position.