Terrible. It always points out non-existent "advanced issues", requiring a paid subscription to fix, and constantly rips up my perfectly-good text.

Furthermore, the UI is terrible. The only thing it is good for is a spell checker, but we all have these built-in.

Do not recommend.

So, many apps want all the site info we visit and all the data it collects. Though some reviews talk about constant advertising to go premium, I'll see how it compares to AI Grammar Checker & Paraphraser – LanguageTool. Maybe it'll have easier ways to write lazily, so I can use the spelling/grammar check to quickly, simply fix all my errors.

Too much spam like "Auto-activation filters..." I didn't pay for that

Does not work. After signing into the website and my paid premium account, the add-on indicates that I am not signed in. I tried to get help from customer support but they couldn't fix it.

Used to be good, but now is constantly advertising "premium" features which were standard. Using LanguageTool now
https://addons.mozilla.org/en-US/firefox/addon/languagetool/

Used to like it, but with "premium suggestions" that can't be disabled it turned from helpful to insufferably annoying. Switching to LanguageTool, hope it'll be better. If not - I'll be better off without a grammar checker than with something that just doesn't like my writing style and won't shut up.

Only a 1 star for now because if your using dark mode, the red line for misspelled words doesn't show up anymore. :(

To note I'm using the extension Dark Reader and FFs own Dark Mode.

works, but much worse privacy than the mozilla's recommended languagetool addon (https://addons.mozilla.org/en-US/firefox/addon/languagetool/)

Pretty much all spellchecker extensions now suffer from this problem, but about half of the suggestions I get nowadays are not helpful and about one-quarter are simply wrong.

Paid extension after a while.

Fix that garbage. The problems with sign in are just joke. Your excuse with conflict with certain adblock is also a joke as i do not use any on youtube as a premium user.

Its infuriating that they started forcing me to see a million gold lines all over my essays for 'premium suggestions'. It is distracting, the suggestions are stylistic and useless, and there is no way to disable them. It is disgusting how greedy and unhelpful it is. Best find a different extension if you're just looking for grammar and spelling corrections.

The interface of this add on gets in the way more than it ever does any good.
Who on earth wants a little circle blocking the last letters of their search bar? This should ONLY be available threw the right click context menu like the way we have accessed additional features for decades.
Like a good special effect in a movies, you shouldn't know you even have an add on until you need it, and then it's access should be minimalist. Not an add to sell you coming to your web site.
Why would I EVER pay you if you are this annoying for free.
This app will only HELP you learn better English because it is SUCH a bad experience you will get better to avoid it.
Sadly... it still appears to be the best.
I perform an unnatural act for FOSS version. Or one that simply used google like enhanced spelling does on chrome.

Its great WHEN it works. Constantly signs me out or disappears entirely. Need a lot of work considering its cost.

All I want is to download Grammarly FireFox Extension. Where is the download?

Extremely bad. Maybe one out of twenty problems it finds is an actual problem, the rest are false errors that ruin the grammar in your text.

Just straight up does not work anymore. It's run into the infamous chatbot problem where it peaked before slowly degrading into nonsense. Many programs like this have been having the same issue so good luck finding one that still works, especially after the "AI boom" that made any automated computer program unusable.