YouCap is a community-driven captioning service made to bridge the gap between content creators and users impacted by disabilities or language barriers.

YouCap promo image
What is YouCap?

YouCap is a Firefox add-on by YouCap. This add-on has 7 daily active users, an average user rating of 3.00, and was removed from Firefox Browser Add-ons 11 days ago. The latest version, 0.3.0, was updated 2 years ago.

This add-on was removed from Firefox Browser Add-ons on 2023-01-23
Stats date:
By: YouCap
Users: 7
Rating: 3.00 (2)
Version: 0.3.0 (Last updated: 2020-12-14)
Creation date: 2020-10-27
Weekly download count: NaN
Firefox on Android: No
Manifest version: 2
  • *://*
  • storage
  • tabs
Featured: No
Size: 36.41K
Email: Click to see
Risk impact: High risk impact
Risk likelihood: High risk likelihood
Found a bug?

Other platforms

Not available on Chrome
Not available on Edge
This extension interfaces with captions that are created through the YouCap website ( and overlays them on top of YouTube videos, when they're available.

Currently, the platform supports English, French, and Spanish captions, with plans to expand on this list in the future.
Risk impact

YouCap requires a number of risky permissions that can potentially harm your browser and steal your data. Exercise caution when installing this add-on. Review carefully before installing. We recommend that you only install YouCap if you trust the publisher.

Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypass your security settings, and access your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Risk likelihood

YouCap may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.

Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Browser Add-ons, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on, especially ones with higher risk impact and/or higher risk likelihood.

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User reviews
I am unable to access the website, the website has an unknown certificate
by Gersonzao, 2023-01-22
View all user reviews

The manifest file declares the requirements and permissions that a Firefox add-on will have access to. By reviewing the manifest, you may be able to determine if a Firefox add-on is over-reaching (for example, if an extension is overriding your new tab page, or search provider, or requesting access to your web activities without any good reason).

  "manifest_version": 2,
  "name": "YouCap",
  "version": "0.3.0",
  "default_locale": "en",
  "description": "An extension for YouCap, a community-driven alternative to YouTube's community captions.",
  "homepage_url": "",
  "icons": {
    "16": "icons/logo-16.png",
    "32": "icons/logo-32.png",
    "64": "icons/logo-64.png",
    "512": "icons/logo-512.png"
  "page_action": {
    "default_popup": "popup.html",