Content-Type Fixer

Name: Content-Type Fixer
Rating: 4.7111 (45 reviews)
Author: jscher2000

By: jscher2000

Firefox doesn't follow instructions for downloads? "Always Open Similar Files" is missing? This usually happens because the server sent Firefox a wrong/generic Content-Type header, or forces a download with Content-Disposition. Here's a fix.

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Features & Capabilities

Content-Type Fixer is a Firefox extension designed to fix download issues caused by incorrect or generic Content-Type headers and problematic Content-Disposition settings. When enabled, it monitors downloads and automatically corrects Content-Type headers for common file extensions like .pdf, .zip, .docx, .xlsx, .pptx, and more, ensuring files open or download properly without manual intervention.

The extension also addresses errors with spaces in Content-Disposition filenames that can cause truncated download names. Users can toggle the extension's monitoring on and off with a toolbar button and customize Content-Types for additional file types via a log interface. Optional settings allow forcing inline or attachment download behavior to streamline file handling. This tool is particularly useful for users encountering download issues in Firefox due to server misconfiguration or inconsistent header information.

User Growth & Download Statistics

Add-on Developer Tools Privacy & Security

By:

Daily users:

Rating:

Version:

1.7.5 Last updated: 2025-04-22

Version code:

5934848

Creation date:

2018-11-01

Risk:

Permissions:

Size:

54.78KB

Email:

js*****@outlook.com

URLs:

Website

Full description:

Source:

Firefox Add-ons Store

Data ingested on:

2026-06-18

Compare stats and ranking:

Ranking

# 2,434 ▲ 53

Other rankings

#209 in Download Management ▲ 4

#8 in bug fixes keyword 46

#22 in typing keyword 23

#33 in instruction keyword 3 ▲ 1

#35 in concert keyword 5 ▲ 1

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For Developers

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Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.

Developed by:

jscher2000

Firefox Add-ons Store

https://addons.mozilla.org/firefox/addon/content-type-fixer/

Email:

js*****@outlook.com

Website:

https://github.com/jscher2000/Content-Type-Fixer-extension/issues

User Reviews

Content-Type Fixer is highly praised for resolving Firefox's inadequate default handling of file types, allowing proper download and opening of diverse files like .bib, .docx, .epub, and markdown files. Users appreciate its ability to add missing content-type configurations, effectively addressing long-standing Firefox deficiencies. However, some issues persist, such as occasional malfunction for certain file extensions, side effects like unwanted content replacement on some websites, and manual cleanup of temporary files. Overall, it's considered a vital and life-saving tool for users facing these problems in Firefox.

Pros

Effectively fixes file type and content-type handling issues in Firefox, enabling correct opening and downloading of various file extensions such as .bib, .docx, .mkv, .acsm, .epub, and markdown (.md) files.
Resolves longstanding user frustrations with Firefox's default application associations and missing content-type handling features.
Allows users to customize or add new content types, improving download and open behaviors for unsupported or incorrectly handled file types.
Saves time and effort by automating content type adjustments, preventing loops or improper file handling.
Highly appreciated by users who faced critical usability problems and have been searching for a solution for a long time.

Cons

One review mentioned a potential issue where content on some websites was replaced with a Mediafire download even when the extension was off, indicating possible unwanted behavior or a potentially unwanted program (PUP) trait.
Some users reported it did not work for specific file types or situations, such as saving .adi files without the extension, possibly due to Firefox updates.
Requires manual management of temporary files for automatically opened downloads (e.g., .acsm files), adding some minor user overhead.

Recent reviews

by mk*****, 2026-06-02

this really a life saver, it fixes my waterfox issue when opening an image in google chat

by gu*****, 2025-05-26

love it

by Fi*****, 2025-05-04

View all user reviews ›

Is Content-Type Fixer Safe?

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.

Content-Type Fixer requires a few sensitive permissions. 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 Add-ons Store, 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.

Content-Type Fixer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details

High This extension has low user count. Unpopular extensions may not be stable or safe.
Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
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