Is "Vidmo" on Firefox Add-ons Safe to Install?

weaving · firefox · v26.3.1

Vidmo is a video clipping tool that lets you record short clips of any video without recording your screen. It also lets you download the video (if possible), and download the current video frame. Audio clips are supported. Video clips are in WebM format and can be converted. Currently, there are some rare Firefox issues that will be handled in the upcoming versions.

Risk Assessment

Analyzed
85.54
out of 100
CRITICAL

18 security findings detected across all analyzers

Firefox extension requesting 3 permissions

Severity Breakdown

0
Critical
14
High
4
Medium
0
Low
0
Info

Finding Categories

13
Malware Signatures
1
Obfuscation
3
Network

YARA Rules Matched

9 rules(13 hits)
postinstall obfuscation postinstall crypto operations postinstall file manipulation postinstall network communication postinstall file download postinstall registry modification postinstall system command postinstall persistence mechanism NoUseWeakRandom

Requested Permissions

3 permissions
<all_urls>

Access and modify data on every website you visit

Dangerous
tabs
Medium
storage
Low

About This Extension

Vidmo is a video clipping tool that lets you record short clips of any video without recording your screen. It also lets you download the video (if possible), and download the current video frame. Audio clips are supported. Video clips are in WebM format and can be converted. Currently, there are some rare Firefox issues that will be handled in the upcoming versions.

Detailed Findings

18 total

YARA Rule Matches

9 rules

Security Analysis Summary

Security Analysis Overview

Vidmo is a Firefox Add-ons extension published by weaving. Version 26.3.1 has been analyzed by the Risky Plugins security platform, receiving a risk score of 85.54/100 (CRITICAL risk) based on 18 security findings.

Risk Assessment

This extension presents critical security risk. Severe issues were detected, potentially including malware indicators, exposed secrets, or dangerous behaviors. Installation is strongly discouraged until these issues are addressed.

Findings Breakdown

  • High: 14 finding(s)
  • Medium: 4 finding(s)

What Was Analyzed

The security assessment covers multiple analysis categories:

  • Malware Detection: YARA rule matching against 2,400+ malware signatures
  • Secret Detection: Scanning for exposed API keys, tokens, and credentials
  • Static Analysis: Code-level security analysis for common vulnerability patterns
  • Network Analysis: Detection of suspicious network communications and endpoints
  • Obfuscation Detection: Identification of code obfuscation techniques

Developer Information

Vidmo is published by weaving on the Firefox Add-ons marketplace. The extension has approximately 160 users.

Recommendation

This extension is not recommended for installation without thorough manual review. Consider alternatives with lower risk scores, or contact the developer to address the identified security concerns.

Frequently Asked Questions

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