
Read, write and watch cookies from an MV3 extension
Use the Chrome cookies API in Manifest V3 to read, edit and watch cookies. Fix empty getAll results, host permissions and duplicate cookies with runnable code.
Maxim Kosterin
18 min read
4 articles found

Use the Chrome cookies API in Manifest V3 to read, edit and watch cookies. Fix empty getAll results, host permissions and duplicate cookies with runnable code.

Cookie extensions touch your session tokens and every site you visit. I compared Cookie-Editor, Cookie AutoDelete and the banner blockers on who owns them.

I mapped browser extension permissions across 308,210 live listings: 62% claim storage, 7.4% can read every site you visit. Here's what to pause on.
The cookies permission lets extensions read, write, and delete cookies — including session tokens. Here's what that means for your accounts and how to check.