Always allow sites to open links in app

[Snout]

If I want to open YouTube-links in FreeTube, I always get this notification. If I tick the box, it's only been saved until I restart Firefox. This is causing me discomfort. Is there an option to save this forever? If not, please add this. (I'm using private mode, maybe these have an effect.)

German notification:

Translated to English:

[Jon]

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