- Apply Bionic Reading style with adjustable strength to a webpage.
- Adjustable vowels for different languages.
- Adjustable font family, font size, font weight and font opacity.
- Support Unicode characters.
- Apply dark mode to a webpage.

Bionic Reader: A Firefox Add-on For Bionic Reading
Bionic Reader is a user-friendly Firefox extension that applies Bionic Reading technique to any webpage, enhancing reading experience. With adjustable settings, it helps to alter font, size, weight and opacity as per user preference. It also supports Unicode characters and can customize vowels based on different languages. Adding to the readability, it provides an option to switch to dark mode.
Add-on stats
Manifest V2
Weekly download count: 110
Firefox on Android: Yes
Permissions:
- storage
- tabs
Size: 32.67K
Full description: See detailed description
Source: Firefox Browser Add-ons
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated.
Pros
- User-friendly interface with easy customization of fonts
- Supports dynamic websites and remembers user preferences
- Good for focus by transforming how text is presented
- Free alternative to paid options
- Effective for personalizing web browsing experience
Cons
- Breaks various websites, including popular ones like WhatsApp and ChatGPT
- Issues with saving settings and configuration
- Lacks wildcard support for domain exceptions
- Conflicts with other extensions like Dark Reader
- Keyboard shortcut conflicts with other applications
Most mentioned
- Extension breaks many websites
- Need for a whitelist/blacklist feature
- Challenges with saving settings and configurations
- Desire for more customization options (emphasis styles, text formatting)
- Concerns about potential security implications
User reviews
Nice addon. Does what Iwant it to do. Though, something I would like to see would be to customize what the emphasis visual manifestation would be. You see, some websites may have many text rendered in bold by their design, which makes the bionic text not stand out as they should be.
At the very least, I'd like to be able to choose between bold and italic, as not many design trends make use of italics.
But if you really think you can take down the challenge, perhaps you could implement a custom open tag and end tag option that would sandwich the emphasized tesxt (ex: example -> ::exa::mple (this is a crazy example but the feature is empty and disabled by default and is up to the user)) or emphasize the text with another font entirely ! (if that is even possible).
But if we really want to stay grounded, perhaps the most Minimum Viable Product for my feature requiest would be for me, the user, to be able to choose the Emphasis style between: bold, italics, and background highlighting (as if I was using a highlighter). This might require some rethinking of the extension UI as most actual options would be relevant for the bold style.
by Noot-heen, 2025-03-14
by 退出党团队远离中共邪教, 2025-02-09
Tá deixando todos os sites cinza, tá adionando a linha de codigo "background-color: rgb(48, 56, 65) !important;" no body e tá irritando bastante, desativei
by Firefox user 18808831, 2025-01-31
Add-on safety
Risk impact
Bionic Reader requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood
Bionic Reader has earned a fairly good reputation and likely can be trusted.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
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