Well for one it is not just a side functionality as the manager in chrome. It also is open source and was audited several time by external experts. And lastly it is super simple to use on pretty much any platform.

Google maps, bitwarden, telegram

Honorable mention: Boost for reddit (hopefully soon to be replaced by boost for Lemmy 😁)

Some small addition to the last option:

If you want to browse a community from a specific instance on your home instance you have to add the ‘home’ instance.

For example your home instance (where you did register your account) is Lemmy.ml and the community you want to interact with is on Lemmy.world you would use:

Https://Lemmy.ml/c/nostupidquestions@lemmy.world

In order to be able to post, reply etc