Is Meisai safe?
Checked version: 5.4.2 · Scan date (UTC): 2026-11-14
Automated analysis of publicly available code — not a professional security audit. It may produce false positives and does not prove an extension is unsafe or safe. Treat it as one signal among many. Disclaimer · Report an issue
How it ranks
Findings breakdown
detected
Permissions requested
View open tabs
Can see URLs and titles of all open tabs
Execute scripts in pages
Can inject and execute JavaScript code in web pages
Access all HTTP sites
Can read and modify content on all non-encrypted websites
Access all HTTPS sites
Can read and modify content on all encrypted websites
Access browsing history(optional)
Can read and modify your complete browsing history
Store local data
Can save data locally in the browser for persistence
Unlimited local storage
Can store large amounts of data locally without size limits
Show notifications
Can display desktop notifications outside the browser
Access current tab
Can temporarily access the content of the active tab when you click the extension
Access bookmarks
Can read and modify your saved bookmarks
Schedule tasks
Can schedule periodic background tasks
Block network requests (declarative)
Can block or redirect network requests using predefined rules without seeing content
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What this assessment covers
- Store listing
- Firefox
- Checked version
- 5.4.2
- Current listed version
- 5.4.2
- Scan date (UTC)
- Assessment status
- Completed
Recorded findings: 1 critical and 3 high severity. Read the finding details before interpreting the score; automated flags are not proof of malicious behaviour.
Automated analysis looks for suspicious code, permissions and other risk signals. It does not observe every runtime behaviour or independently audit the publisher’s servers. A low-risk result is not a guarantee of safety. How our checks work.