The Grammarly Browser Extension: Everything It Can and Cannot Do

After three years of daily use, here is an honest guide to what the extension actually covers, where it falls short, and the settings worth changing.

The browser extension is why most people stick with Grammarly over competitors. It follows you everywhere — email, social media, CMS, Google Docs, web forms. Most competitors still require copy-pasting text into their interface. Here is what it actually does and does not do.

Where it works well

Gmail and most webmail: excellent — activates in the compose window and flags issues as you type. Google Docs: good, with occasional quirks around formatting. LinkedIn: works in post and message composers. WordPress and most CMSes: generally good. Twitter and most social networks: yes, including text composition boxes.

Where it is limited

PDF editors: no. Desktop apps (Word, Outlook desktop): requires a separate Grammarly for Windows or Mac application. Some CMSes with custom rich text editors block it. Slack: works in browser-based Slack; desktop app requires a separate integration.

Settings worth knowing

Click the green G icon in any active text field to open a sidebar with your full document's suggestions. Adjust Goals from this sidebar — the most important setting for improving suggestion quality. You can also temporarily disable the extension on specific websites: right-click the G icon in your browser toolbar for this option.

The standalone editor

Grammarly.com has a full writing environment where you can paste or write documents and see all suggestions at once. Useful for long documents where you want a complete analysis rather than real-time suggestions. The extension alone is the reason to choose Grammarly over most alternatives.

What this really means in practice

The practical question behind The Grammarly Browser Extension: Everything It Can and Cannot Do is not whether AI writing tools sounds impressive in theory. It is whether the advice survives contact with an ordinary draft, a busy inbox, a deadline, or a reader who is not already convinced. That is the standard I use throughout this guide: if a recommendation does not make the next draft clearer, faster, or easier to trust, it does not deserve space on the page.

A useful writing tool should make your decisions sharper, not quieter. The simplest way to judge it is to keep the original draft open beside the edited version and ask what changed: did the tool remove mistakes, clarify the point, and preserve intent, or did it merely smooth the sentence until it sounded like every other article on the internet?

A simple way to apply it today

Start with one small test. Take a real piece of writing connected to this topic, not a perfect sample made for a tutorial. Read it once for meaning, once for structure, and once for friction. On the first pass, ask whether the point is worth making. On the second, ask whether the order helps the reader. On the third, look for the exact sentence where attention drops. That sentence is usually where the improvement begins.

For AI writing tools, the hidden cost is not the subscription. The hidden cost is unearned confidence. A sentence can sound polished while still being thin, vague, or factually weak. That is why every tool in this category needs a human review step: check the claim, check the example, check whether the paragraph actually helps the reader do something.

Mistakes to avoid

• Do not optimize the wrong thing. A cleaner sentence is not always a better argument. Improve clarity without sanding away evidence, personality, or useful specificity.
• Do not compare tools or techniques in the abstract. Test them on the kind of writing you actually produce, because a student essay, a client email, a blog post, and a newsletter all punish different weaknesses.
• Do not let speed become the whole goal. Faster writing is valuable only when the final message is still accurate, considerate, and recognizably yours.

My working checklist

• Does the opening tell the reader exactly what problem is being solved?
• Can a busy reader understand the recommendation by scanning the headings?
• Is there at least one concrete example, not only general advice?
• Would I still stand behind this paragraph if a reader made a decision from it?
• Is the final version sharper without becoming colder?

Final verdict

The best version of this advice is deliberately practical: use AI writing tools to reduce uncertainty, not to hide from judgment. The page should leave you with a clearer next action, not just a stronger opinion. If you remember only one thing from this article, remember this: the winning choice is the one that improves the real writing in front of you.