EPUBReader

Name: EPUBReader
Rating: 3.6977 (387 reviews)
Author: epubreader

Read ePub files right in Firefox. No additional software needed!

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EPUBReader is a Firefox extension that allows you to read ePub files directly in your browser without needing additional software. Avoid annoying download prompts by accessing your saved ePub files conveniently via the toolbar button. Enhance your reading experience by pairing it with the Read Aloud extension to listen to your eBooks. The extension requires permissions to download and open ePub files from websites and to save your books locally. For support or to report issues, users can visit the dedicated support site. EPUBReader brings simplicity and convenience to eBook reading inside Firefox.

Add-on Productivity Entertainment Education

By:

Daily users:

Rating:

Version:

2.0.13 Last updated: 2020-06-22

Version code:

5050001

Creation date:

2009-10-22

Risk:

Permissions:

webNavigation
webRequest
webRequestBlocking
downloads
<all_urls>
storage

Size:

188.02KB

URLs:

Website

Full description:

Source:

Firefox Browser Add-ons

Data ingested on:

2025-07-13

Ranking

# 139 ▼ 2

Other rankings

#5 in Other extensions

#1 in break keyword 11

#2 in file keyword 56

#2 in header keyword 43

#2 in software keyword 48

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Other platforms

EPUBReader (v2.1.1)

208,569 4.20

(37)

User reviews

EPUBReader effectively opens EPUB files and is praised for ease of installation and clear instructions. However, users report it doesn't support PDF files, making it unsuitable for some academic work. Navigation is considered cumbersome due to repeated returns to the table of contents after chapters. Some experience UI issues with buttons positioned off-screen. Additionally, there are concerns over the add-on's permissions and lack of transparency regarding data access.

Pros

Open EPUB documents as expected.
Simple to download and use.
Instructions are clear and easy to follow.

Cons

Does not support PDF files, limiting use for some assignments.
User interface/navigation is cumbersome; requires returning to the table of contents after each chapter.
Button positioning issues, with controls sometimes appearing off-screen.
Concerns about permission requests and unclear rationale for access to user data and browsing activity.

Recent reviews

by ii*****, 2025-07-06

by Fi*****, 2025-06-18

by Fi*****, 2025-06-17

View all user reviews ›

Extension safety

Risk impact

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, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

EPUBReader 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

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.

EPUBReader has earned a fairly good reputation and likely can be trusted.

Risk likelihood analysis details

Low This extension was updated more than 6 months ago. Older versions are more likely to be stable and safe.
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