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

System command execution detected

Cryptographic operations detected

Network communication detected

File system manipulation detected

File download activity detected

Environment configuration file path detected

Persistence mechanism detected

Environment variable access detected

Code obfuscation techniques detected

Session storage and local storage are HTML 5 features which allow developers to easily store megabytes of data client-side, as opposed to the 4Kb cookies can accommodate. While useful to speed applications up on the client side, it can be dangerous to store sensitive information this way because the data is not encrypted by default and any script on the page may access it. This rule raises an issue when the localStorage and sessionStorage API's are used. For more information checkout the OWSAP A3:2017 (https://owasp.org/www-project-top-ten/2017/A3_2017-Sensitive_Data_Exposure.html) advisory.

alert(...) as well as confirm(...) and prompt(...) can be useful for debugging during development, but in production mode this kind of pop-up could expose sensitive information to attackers, and should never be displayed. For more information checkout the CWE-489 (https://cwe.mitre.org/data/definitions/489.html) advisory.

Browsers allow message exchanges between Window objects of different origins. Because any window can send / receive messages from other window it is important to verify the sender's / receiver's identity: When sending message with postMessage method, the identity's receiver should be defined (the wildcard keyword (*) should not be used).\nWhen receiving message with message event, the sender's identity should be verified using the origin and possibly source properties. For more information checkout the OWASP A2:2017 (https://owasp.org/www-project-top-ten/2017/A2_2017-Broken_Authentication) and (https://developer.mozilla.org/en-US/docs/Web/API/Window/postMessage) advisory.

When software generates predictable values in a context requiring unpredictability, it may be possible for an attacker to guess the next value that will be generated, and use this guess to impersonate another user or access sensitive information. As the Math.random() function relies on a weak pseudorandom number generator, this function should not be used for security-critical applications or for protecting sensitive data. In such context, a cryptographically strong pseudorandom number generator (CSPRNG) should be used instead. For more information checkout the CWE-338 (https://cwe.mitre.org/data/definitions/338.html) advisory.

Windows registry modification detected