YouTube Fast Fullscreen Toggle

The extension has a focused, legitimate purpose of enhancing YouTube's fullscreen functionality. With 3,000 users and a solid 4.6-star rating from 83 reviews, it demonstrates reasonable user satisfaction. The extension uses Manifest V3, which provides better security protections compared to older manifest versions. The technical implementation appears clean with no background scripts or web accessible resources that could pose additional risks.

The main limitation is the relatively small user base of 3,000, which provides less community validation compared to extensions with hundreds of thousands of users. Missing developer information reduces transparency about who created and maintains the extension. The content script injection on YouTube pages, while necessary for the extension's functionality, does require some level of trust that the code won't be misused.

This extension appears safe for general use given its minimal risk profile and focused functionality. The lack of broad permissions and clean technical implementation suggest responsible development practices. Users comfortable with the small user base can install this extension in their main browser profile. For extra caution, users could monitor the extension's behavior initially or check for any unusual network activity, though this level of scrutiny isn't strictly necessary given the minimal risk assessment.