Docs / Browser privacy / Window size
Why Tor Browser adds grey margins around every page
The grey bars around pages are a privacy feature, not a display bug.
Last updated
Screen size as a fingerprint
Websites can read the size of your browser window. Unusual sizes help tell visitors apart.
What letterboxing does
Tor Browser rounds the content area to common sizes and fills the rest with margins, so many users report the same size.
Leave it alone
Avoid dragging the window to odd sizes or zooming heavily. The defaults keep you in the largest possible crowd.
On a phone
Mobile Tor Browser handles this differently, but the same advice applies: avoid unusual zoom levels while visiting the torzon market link.
Tip Keep Tor Browser at its default window behaviour so you look like everyone else.
Addresses The verified Torzon addresses are listed on the overview page.
See also
- Why you should not add extensions to Tor Browser Browser privacy
- New Identity or New Circuit: which to use and when Browser privacy
- Handling files downloaded from onion services Browser privacy