GreerGuard โ Browser Anti-Lockup by GreerGuard
Detects and blocks browser traps that lock your screen and hide your cursor.
Available on Firefox for AndroidโขAvailable on Firefox for Androidโข
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About this extension
GreerGuard Browser
GreerGuardโข protects you from browser-based scams that try to lock and prevent you from leaving a webpage.
๐ช๐ต๐ฎ๐ ๐ถ๐ ๐ฏ๐น๐ผ๐ฐ๐ธ๐
Some malicious pages take over your browser and try to prevent you from leaving, displaying fake "your computer is infected" alerts with countdown timers designed to pressure you into calling a scam number or installing malicious software. GreerGuard detects these deceptive behaviors in real time and redirects you to a clear warning page before you can be tricked.
๐๐น๐ถ๐ฝ๐ฏ๐ผ๐ฎ๐ฟ๐ฑ ๐ฝ๐ฟ๐ผ๐๐ฒ๐ฐ๐๐ถ๐ผ๐ป
Some pages silently overwrite your clipboard without you copying anything. GreerGuard intercepts these attempts and alerts you immediately, showing you what was written and giving you a one-tap option to clear it.
๐๐ ๐๐ฒ๐ป๐๐ถ๐ผ๐ป ๐ฎ๐๐ฑ๐ถ๐
GreerGuard scans your other installed browser extensions and flags any that hold unusually powerful permissions, such as reading every page you visit, accessing your cookies, or routing your traffic through a third-party server. You decide what to keep.
๐๐ณ๐๐ฒ๐ฟ ๐๐ผ๐ ๐ฝ๐ฟ๐ผ๐ฐ๐ฒ๐ฒ๐ฑ
If you choose to continue past a warning, GreerGuard follows up with a quiet prompt asking whether the site turned out to be safe, so you can trust it going forward or close the tab with a single tap.
๐๐ถ๐๐๐ผ๐ฟ๐ & ๐๐ถ๐๐ฒ ๐บ๐ฎ๐ป๐ฎ๐ด๐ฒ๐บ๐ฒ๐ป๐
Every blocked or flagged site is logged locally so you can review what was caught. Trusted sites are saved and never warned again. You can audit and report suspicious sites directly from the popup.
๐ฆ๐๐ป๐ฐ ๐๐ถ๐๐ต ๐๐ป๐ฑ๐ฟ๐ผ๐ถ๐ฑ
Pair with the GreerGuard Android app using a pairing code to send blocked site events to your Android app in real time.
๐๐ผ๐ ๐ถ๐ ๐๐ผ๐ฟ๐ธ๐
GreerGuard watches for deceptive behavioral patterns only. It does not use blocklists of domain names or scan page content. Detection is entirely on-device. When you have not linked the extension to the GreerGuard Android app, no browsing data is collected or transmitted.
๐ฃ๐ฒ๐ฟ๐บ๐ถ๐๐๐ถ๐ผ๐ป๐ ๐๐๐ฒ๐ฑ
โธ Read and change data on websites: required to observe page behavior and inject the warning UI
โธ Manage extensions: used only to read the name and permissions of your installed extensions for the audit feature; GreerGuard cannot install, remove, or modify any extension
GreerGuardโข protects you from browser-based scams that try to lock and prevent you from leaving a webpage.
๐ช๐ต๐ฎ๐ ๐ถ๐ ๐ฏ๐น๐ผ๐ฐ๐ธ๐
Some malicious pages take over your browser and try to prevent you from leaving, displaying fake "your computer is infected" alerts with countdown timers designed to pressure you into calling a scam number or installing malicious software. GreerGuard detects these deceptive behaviors in real time and redirects you to a clear warning page before you can be tricked.
๐๐น๐ถ๐ฝ๐ฏ๐ผ๐ฎ๐ฟ๐ฑ ๐ฝ๐ฟ๐ผ๐๐ฒ๐ฐ๐๐ถ๐ผ๐ป
Some pages silently overwrite your clipboard without you copying anything. GreerGuard intercepts these attempts and alerts you immediately, showing you what was written and giving you a one-tap option to clear it.
๐๐ ๐๐ฒ๐ป๐๐ถ๐ผ๐ป ๐ฎ๐๐ฑ๐ถ๐
GreerGuard scans your other installed browser extensions and flags any that hold unusually powerful permissions, such as reading every page you visit, accessing your cookies, or routing your traffic through a third-party server. You decide what to keep.
๐๐ณ๐๐ฒ๐ฟ ๐๐ผ๐ ๐ฝ๐ฟ๐ผ๐ฐ๐ฒ๐ฒ๐ฑ
If you choose to continue past a warning, GreerGuard follows up with a quiet prompt asking whether the site turned out to be safe, so you can trust it going forward or close the tab with a single tap.
๐๐ถ๐๐๐ผ๐ฟ๐ & ๐๐ถ๐๐ฒ ๐บ๐ฎ๐ป๐ฎ๐ด๐ฒ๐บ๐ฒ๐ป๐
Every blocked or flagged site is logged locally so you can review what was caught. Trusted sites are saved and never warned again. You can audit and report suspicious sites directly from the popup.
๐ฆ๐๐ป๐ฐ ๐๐ถ๐๐ต ๐๐ป๐ฑ๐ฟ๐ผ๐ถ๐ฑ
Pair with the GreerGuard Android app using a pairing code to send blocked site events to your Android app in real time.
๐๐ผ๐ ๐ถ๐ ๐๐ผ๐ฟ๐ธ๐
GreerGuard watches for deceptive behavioral patterns only. It does not use blocklists of domain names or scan page content. Detection is entirely on-device. When you have not linked the extension to the GreerGuard Android app, no browsing data is collected or transmitted.
๐ฃ๐ฒ๐ฟ๐บ๐ถ๐๐๐ถ๐ผ๐ป๐ ๐๐๐ฒ๐ฑ
โธ Read and change data on websites: required to observe page behavior and inject the warning UI
โธ Manage extensions: used only to read the name and permissions of your installed extensions for the audit feature; GreerGuard cannot install, remove, or modify any extension
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Permissions and data
Required permissions:
- Input data to the clipboard
- Download files and read and modify the browserโs download history
- Monitor extension usage and manage themes
- Display notifications to you
- Access browser tabs
- Access browser activity during navigation
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 3.23
- Size
- 107.08 KB
- Last updated
- 8 days ago (Aug 20, 2026)
- Related Categories
- License
- All Rights Reserved
- Version History
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