deleted by creator

Very much so. Canonical stopped developing it a long time ago, but it’s a community project now.

I don’t think Lemmy proper has that feature yet, but some apps might.

Other than that you could open an account on an instance more in line with your prefered blocks or use kbin which already allows for instance blocking.

I have a masto account on c.im and everything is fine here. Are you trying to access your own c.im account, just the website or view c.im account posts from an instance other than c.im?

From the twitch pages

The desktop web browser experience of twitch.tv and supporting sites, officially support the latest two versions of Google Chrome, the latest two versions of Mozilla Firefox, the most recent version of Microsoft Edge, and the most recent version of Apple Safari.

https://help.twitch.tv/s/article/supported-browsers?language=en_US

What’s your browser version OP, so we can rule out whether it’s just a version issue

Limiting the visibility of somebody voice is also censorship

It’s not (always). Especially if the people “limiting your voice” are the ones giving you the platform to reach other people in the first place, usually out of their own pocket or thanks to donations. In the fediverse at least you can always set up your own instance.

People not wanting to engage with other people is not censorship. Nobody is entitled to someone else’s attention.

Peertube is a video and streming platform (like youtube) and owncast a streaming platform (like twitch) that are FOSS, self-hostable and connected to the Fediverse. Although I don’t think getting any amount of viewers on those platforms will be any easier.