There is a bugzilla entry that states the removal was due to too little user benefit for the development effort required. And since I don’t necessarily need this feature, I can understand they directed the resources to where they are needed more. Nevertheless, it would be nice to have.
The way I use it is primarily for applications that produce audio output, so I get appropriately named per-app volume sliders in pulseaudio/pipewire and not just a bunch of audio streams titled “Firefox”.
I use Brave as a secondary browser for PWAs on the desktop. I wish Firefox would support it again.
C:\con\con
A self-hosted instance of miniflux. After trying several other options over the years, I settled on this one.
Also, while Matrix offers E2EE, the amount of metadata the protocol generates by design is something you should be aware of.
There is also this issue with portalled rooms regarding the libera IRC bridge.
I tend to use Firefox’s “Inspect” context menu entry on the element and disable the paste/keydown/keyup event listeners in the element inspector.
With 20k GitHub stars not really obscure I suppose, but maybe someone doesn’t know it:
https://gchq.github.io/CyberChef/
Works offline and you can chain recipes.