I am a paying premium user of Grammarly. At first, I was very happy with Grammarly and excited to try it out. I absolutely love the Microsoft Word integration and will continue to use and depend on it. However, when it comes to browsing the web, Grammarly simply does not work or offer much for me since I use Firefox and Firefox Nightly. Grammarly constantly pesters me to log in (it NEVER remembers my login info) and this is a nuisance. More importantly, it lacks important functionality. It simply does not detect simple spelling and grammar errors when I'm writing new social media posts on Facebook and Twitter, and it does not yet have a Google Docs integration/add on. Use Grammarly for its Microsoft Word integration, not the Firefox add on for web browsing -- I like gmbh LanguageTool the best of what I've tried.