There’s plenty of left wing echo chambers, but they’re leftist, not liberal. r/wayofthebern, for instance, or one of the various communist subreddits are good examples.
The difference here is that leftists extreme enough to fall into those echo chambers are far less common than conservatives. And, of course, they represent a very small subset of the left when compared to conservatives who accept misinformation.
I like Edge
It’s basically chrome but not bloated