How it knows
Your browser introduces itself to every site with a user agent: a line of text naming the browser, its engine and your system. Chrome, Edge and other Chromium browsers also answer a newer, more precise set of questions — client hints — which give the exact version, the real macOS or Windows release, and the processor. This page reads both, and checks the newest releases so it can tell you whether you’re behind.
Why so many browsers say “Chrome”
Most browsers are built on Chrome’s engine, Chromium, and describe themselves as Chrome so that every site works in them. Brave and Arc leave a small trace a page can spot, so they’re named here. Vivaldi, Dia and Tabula are indistinguishable from Chrome on purpose. Safari is the only major browser on WebKit, and Firefox the only one on Gecko — along with the browsers built on it, like Zen.
Find the version yourself
| Browser | Where to look |
|---|---|
| Chrome | Chrome menu › Help › About Google Chrome, or chrome://settings/help |
| Safari | Safari menu › About Safari |
| Firefox | Firefox menu › About Firefox (Help › About Firefox on Windows) |
| Edge | Settings and more › Help and feedback › About Microsoft Edge, or edge://settings/help |
| Brave | Brave menu › About Brave, or brave://settings/help |
| Arc | Arc menu › About Arc |
Chrome, Edge, Brave and Firefox download updates on their own and install them the next time you relaunch — opening the About page makes them check straight away. Safari updates with macOS, through Software Update in System Settings.
Is Tabula a Chromium browser?
Yes. Tabula runs on Chromium, the engine inside Chrome, and identifies itself as Chrome so every site treats it as one — open this page in Tabula and it will say Chrome. What’s different is everything around the engine: sites live side by side on a canvas instead of in tabs, and ads and trackers are blocked from the start. What a spatial browser is.
Questions
Does this page collect anything about me?
No. Everything is read by your own browser and shown back to you; none of it is sent to us or stored. The only request the page makes is for the newest Chrome, Firefox and Edge version numbers, so it can tell you whether yours is current.
Why does it say Chrome when I’m using Arc, Vivaldi or Dia?
Those browsers run on Chrome’s engine and deliberately identify themselves as Chrome, so that sites built and tested for Chrome work in them too. Brave and Arc can still be told apart by the page, so this tool names them; Vivaldi, Dia and Tabula look exactly like Chrome by design.
Why do some sites think my Mac runs macOS 10.15?
Every Mac browser now reports macOS 10.15 in its user agent, whatever you are really running, to make people harder to fingerprint. Chrome, Edge and other Chromium browsers share the real version only when a page asks for it — which this one does. Safari and Firefox don’t share it at all.
How do I check my browser version on an iPhone?
Safari’s version is the same as iOS’s: Settings › General › About. Every browser on iPhone and iPad runs on Safari’s engine, so a Chrome or Firefox there is only as current as the iOS it runs on.
What is a user agent?
A line of text your browser sends to every site, naming itself, its engine and your system. For historical reasons almost every browser’s starts with “Mozilla/5.0” and claims to be several others at once, which is why reading it takes more than a glance.