LanguageTool - a *foss Grammarly alternative (potentially not foss)
LanguageTool - Online Grammar, Style & Spell Checker
*hearing in comments certains parts aren't foss
I use this often when I'm writing articles, it's incredibly easy to use and I've yet to have any issues with it.
I use it on Waterfox, for what it's worth. Absolutely recommend.
Why do you use waterfox?
When I switched from FF to WF it was lighter on system resources, faster and cut out a lot of the telemetry included in FF.
I've not used Firefox for well over a year now, so I can't speak to that still being the case, but those were the main draws for me.
I switched off of waterfox and back to firefox with arkenfox user.js when I noticed they were behind on a security update.
