Nope…

Is this client used also on Chromecast?

I use Jellyfin on Chromecast, and I hear you about subtitles: if I pause the movie, or sometimes just randomly, subtitles starts time-drifting and randomly shows flashes of texts in other languages

wouldn’t this also apply to libre speed test once it gets on their radar?

Ah, ok, my bad. I missed the joke :(

I really thought that the Mozilla extension was an answer to a move that Google made.

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what do you mean by “good battery life”?

Let’s see how that will go in 4 years…

You seem confused. Amazon is in the business of stealing open source project in order to sell them as AWS services, not making them.