Simulates information a color blind person receives and/or adds a daltonization filter.
This addon can be used for testing a website accessibility for the color blind and / or to educate (yourself) on the topic of color blindness.

Let's Get Color Blind Firefox Addon
Let's get color blind is a Firefox add-on that allows users to simulate color blindness, educating themselves about this condition and testing website accessibility. It also includes a daltonization filter to assist those with color vision deficiencies, refining the color information received, although results can vary depending on each individual's condition.
Add-on stats
Manifest V2
By: Nullbrains
Rating: 4.71
(17)
Weekly download count: 42
Firefox on Android: Yes
Permissions:
- https://*/*
- http://*/*
- <all_urls>
- tabs
- storage
Size: 36.91K
Full description: See detailed description
Ranking
User reviews
Pros
- Very useful for accessibility testing and understanding color blindness effects
- Easy to use with multiple filters for different kinds of color blindness
- Simulate function is helpful for designers to check color accessibility
- Effective in daltonizing problematic webpages
Cons
- Lacks a persistence feature, requiring users to activate it for each page
- Missing explanatory details about the different options available
- Settings and features like the severity slider do not work consistently on some versions of Firefox
Most mentioned
- The simulation feature is eye-opening for designers
- The need for a quick-toggle button to switch views easily
- Functionality issues on Linux Mint and other setups, with some users unable to save settings
User reviews
by 远离中共邪教快退出党团队, 2025-02-12
by Jim Parrillo, 2023-10-23
Add-on safety
Risk impact
Let's get color blind requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk impact analysis details
- Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
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Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of Let's get color blind. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
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