Is HTML5 Video Speed Control Safe? — Extension Safety Profile
Quick verdict: HTML5 Video Speed Control earns a safety grade B, 78.6 out of 100, based on 5 of 5 dimensions.
78.6/100
Grade B · 5 of 5 checks
What we found
Automated safety profile from public signals (the extension's manifest & permissions, store listing, publisher, privacy policy). A full review hasn't been published yet.
What this safety grade means
HTML5 Video Speed Control earns a safety grade of B (78.6/100), measured across 5 of 5 dimensions. Its strongest area is Data & Privacy (100%). The weakest is Maintenance & Ownership (10%) — what holds its grade back the most.
On the public records we can check, HTML5 Video Speed Control looks broadly trustworthy. 40,000 active users/installs reported on the store. Store rating 4.5/5 from 1,300 user ratings. Last updated on the store 2022-03-17. This is an automated profile, not a hands-on review — so treat the grade as a starting point: open HTML5 Video Speed Control's own store listing and privacy policy before installing, and weigh it against the other video speed controllers extensions we track below.
Safety Signals
Based on 5 of 5 safety dimensions
| Dimension | Score | Bar | Source |
|---|---|---|---|
| Publisher & Identity | 60% · 4.8/8 pts 2 of 5 checks verified | Automated signals | |
| Permissions & Access | 90% · 22.5/25 pts 3 of 3 checks verified | Automated signals | |
| Data & Privacy | 100% · 16/16 pts 4 of 5 checks verified | Automated signals | |
| Maintenance & Ownership | 10% · 0.8/7.5 pts 1 of 2 checks verified | Automated signals | |
| Community Reputation | 83% · 8.3/10 pts 2 of 4 checks verified | Automated signals |
In-depth safety analysis
This extension can adjust playback speed on HTML5 videos. It requests the "activeTab", "storage", and "scripting" permissions. "activeTab" limits its access to the current tab only when you click the extension icon, meaning it cannot silently read or alter pages you are not actively using. "Storage" lets it save your speed preferences, and "scripting" allows it to inject the speed control functionality into the video page. For a video speed controller, this set of permissions is narrow and expected.
Any video speed control tool can theoretically interfere with page scripts that manage video playback, but with "activeTab" the risk is limited to pages where you deliberately activate the extension. As with all extensions that modify page content, a careful user should ensure they install the official version from the publisher they trust, and be aware that if an extension were compromised, its behavior on the active tab could be misused.
The fact sheet shows a strong Data & Privacy dimension (100%) based on the developer's privacy declarations, which state that data is not sold or used for unrelated purposes. The weakest area is Maintenance & Ownership, scoring only 10%. This likely reflects that the extension has not received an update since March 2022, so long-term compatibility with browser updates and potential security patches may be a concern for users who prioritize actively maintained software.
AI-assisted analysis of the documented signals above (permissions, store data, privacy practices) — explains what they mean and the risks typical for this category. Not a hands-on test.
What the store listing shows
Who's Behind HTML5 Video Speed Control?
- Publisher Cool Apps
Public records identify the publisher, but no individual founders or a separate registered company are named — which is what holds the Publisher & Identity score back. Less public information about who operates an extension means less you can verify about their long-term accountability.
How it compares
Among the 6 Video Speed Controllers extensions we track, HTML5 Video Speed Control scores higher on safety than 50% of them.
Computed from our own database of assessed Video Speed Controllers extensions — updated as we track more.
Evidence on File (12)
HTML5 Video Speed Control FAQ
- Is HTML5 Video Speed Control safe?
- HTML5 Video Speed Control earns a safety grade of B (78.6/100) on our evidence-based assessment, based on 5 of 5 safety dimensions we could verify from public records. This is an automated profile built from public records, not a hands-on review.
- Who is behind HTML5 Video Speed Control?
- HTML5 Video Speed Control is operated by Cool Apps.
Alternatives we track
Youtube Playback Speed Control A Browse all browser extensions we've checked → · Best Video Speed Controllers extensions