I'd argue those are pretty niche. I certainly wouldn't focus on browser development unless I worked for one of the three or four big browser vendors.

Text editors have been moved onto the web, and probably more and more text editing is being done online, for example in Wordpress blogs.

Nothing against "native" text editors, but again, how promising would it be to start out developing a new text editor these days? It still happens, but it is rare enough to get the top HN slot when it happens.