Users who encounter EPUB files online or locally have no built-in browser way to read them; this extension intercepts .epub URLs and provides a full in-browser reading experience

1. User navigates to a URL ending in .epub → declarativeNetRequest rule redirects to the extension's reader.html with the URL as a parameter. 2. OR user clicks the extension toolbar icon → popup.js opens reader.html → user clicks the open button to select a local .epub file. 3. The extension downloads/reads the EPUB, extracts it using its built-in ZIP library, parses the content, and renders it in an iframe. 4. User reads the book with toolbar controls for TOC, bookmarks, font sizing, reading style preferences, and saving.

Target users: Casual readers who encounter EPUB files online / Users who want a lightweight in-browser ebook reader without installing dedicated software / Chrome users who want to open EPUB files by double-clicking in file explorer

All analysis based on source code and manifest; no runtime behavior testing performed
Cannot verify the epubread.com welcome/goodbye pages content as they are external web pages

Monetization

No paid features detected

The extension is completely free with no feature gating, no payment integration, and no premium tier. All keyword false positives explained: 'subscribe' hits are 'oversubscribed' in zlib inflate.js; 'pro' hits are Czech prepositions and 'protection'; 'pay' hits are MIME type definitions; 'license' hits refer to the software's GPL-style open source license. There is only a voluntary donation button (skin/like.png) with no payment processing.

Confidence: 95
Payment platform: --
Source: AI / High
Login required: No
Reason: The extension has no login UI, no account system, no authentication flow, and no user credential handling. All 'authentication' keyword hits in locale files are error messages about external servers requiring auth to download EPUB files (e.g., 'Your ebook can't be opened, because the server requests an authentication'), not the extension requiring login. No 'login', 'password', or 'account' matches exist in the JS source code. The extension stores only reading preferences (font, colors, margins) in chrome.storage.

Permission risk

High-risk permissions

This estimate uses declared permissions and host permissions to assess access scope and sensitivity.

扩展能力较强：downloads、storage
主机权限覆盖范围较宽

Publisher

epubreader

Independent publisher

Email: [email protected]
Phone: --
Address: --

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Permissions

Host access