[Bug 1741074]

[Willi5m]

(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.

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https://bugs.launchpad.net/bugs/1741074

Title:
  [snap] chrome-gnome-shell extension fails to detect native host
  connector

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