Bionic Reader by J.M.
Speed up your reading on any website or PDF. Bionic Reader bolds the first part of each word to guide your eyes, with adjustable strength and a one-key toggle. All processing is local.
Available on Firefox for Android™Available on Firefox for Android™
Extension Metadata
About this extension
Bionic Reader highlights the leading letters of each word so your eyes can
move faster while your brain fills in the rest.
move faster while your brain fills in the rest.
- Toggle it on any website from the toolbar or with Ctrl+Alt+B
- Three fixation strengths (Low / Medium / High)
- A built-in PDF reader: open a PDF and read it with bionic emphasis while
keeping the page's original layout — or turn bionic off for the exact page - Unicode-aware; keeps contractions intact and leaves numbers unbolded
- 100% local — your pages and files are never sent anywhere
Rated 0 by 0 reviewers
Permissions and data
Required permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 1.0.0
- Size
- 639.36 KB
- Last updated
- 11 days ago (Jun 7, 2026)
- Related Categories
- License
- MIT License
- Version History
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