Don't like Libreoffice's implementation of Word support? Install Koffice. I take it you've never installed non-OEM software on your computer?
As a couple parents up stated, there's no technical reason a browser has to have a transformer embedded into it. There might be a business reason like "we made a dumb choice and don't have the manpower to fix it", but I doubt this is something they will accept, at least with a mission statement like they have.
Cool, and some DEs make it possible to start implementing this for most applications today. But Mozilla is not KDE or Gnome, so the most they can do is to make this on their software, and make it easy to copy for the entire system.
> Sounds like a web site, not a browser feature.
Sounds like a bit of lack of imagination on your part. Do you think the same for text search?
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Exactly. Would be nicer if they did their own features somewhat right (including interfaces for configuration and disabling approachable for non-engineers) before they scope-creep the entire desktop.