Reviews of axe DevTools® - Web Accessibility Testing

By: Deque Systems Inc. Add-on

List of user reviews and ratings for axe DevTools® - Web Accessibility Testing

Total ratings

4.17 (Rating count: 54)

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Review summary

The add-on is praised for being very useful for accessibility testing with easy-to-use, clear reports and a clean UI, making it a go-to tool for developers and QA. However, many reviews report it causing site breakage or crashes on various sites and tools, plus concerns about privacy data collection. Some also note background activity and slow loading as disruptive.

Pros

Very useful tool for accessibility testing; helps developers and QA identify issues quickly and keep up with accessibility requirements.
Clear and actionable reports that show what’s wrong, where, and how to fix.
Easy to use with a simple, clean UI that reduces distractions.

Cons

Causes site breakage/crashes on many websites and dev tools (e.g., Kickstarter white pages, Azure/CircleCI, login portals) and can affect pages even when not active.
Privacy concerns: some reviews allege data collection or selling data, while others claim the extension does not capture analytics, reflecting conflicting messaging about privacy.
Background activity and slow loading: reports of the extension running tasks in the background, or endless 'analyzing your page...' loading on local and various pages.

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User Reviews

Recent rating average: 2.70

All time rating average: 4.17

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13% (7)

Date	Author	Comment
2026-03-27	sh*****	can be interestings, but broke some website. Exemple : with free version : kickstarter is broken white page except header.
can be interestings, but broke some website. Exemple : with free version : kickstarter is broken white page except header.
2026-03-24	Fi*****	As another user mentioned, while this is typically a good tool, it appears to be doing some things in the background without being asked to, which is crashing some sites. Unable to use the Wise website, for instance. It loads for a moment and then whitescreens.
As another user mentioned, while this is typically a good tool, it appears to be doing some things in the background without being asked to, which is crashing some sites. Unable to use the Wise website, for instance. It loads for a moment and then whitescreens.
2026-02-05	Fi*****

2026-01-06	Fi*****	It's good at what it is made for and thus very useful. Unfortunately, it appears that it is breaking some websites even when the devtools are not open. For instance, I'm not able to log in to Float or Storyblok when this extension is enabled. (I couldn't find a better place to report this issue)
It's good at what it is made for and thus very useful. Unfortunately, it appears that it is breaking some websites even when the devtools are not open. For instance, I'm not able to log in to Float or Storyblok when this extension is enabled. (I couldn't find a better place to report this issue)
2025-11-19	so*****	After the latest update, this extension is breaking multiple developer-focused websites, including Azure and CircleCI, that I need to use. I've had to disable this extension to workaround it.
After the latest update, this extension is breaking multiple developer-focused websites, including Azure and CircleCI, that I need to use. I've had to disable this extension to workaround it.
2025-11-17	pe*****	After the latest update seems to be interfering with some Azure DevOps plugins. Probably causing issues with other services too
After the latest update seems to be interfering with some Azure DevOps plugins. Probably causing issues with other services too
2025-05-16	My*****

2025-01-08	sh*****

2024-10-10	Ni*****

2023-07-08	Mi*****	As another 1-star review stated, you collect and sell users' personal information, and yet you state that you thought you were being very up front, very clear about the fact that you do. Tell me then, on your MAIN PAGE in Mozilla Extensions, are you saying that you are being up front about it just because the LINK TO your license agreement is listed just above the following? "This extension does not capture any information or usage analytics at all." Can you REALLY not see how people would be lulled into a false sense of security by the above-quoted statement? And please: DON'T come arguing semantics just because the word 'collect' is absent, when the word 'capture' in the quoted statement in question is used instead, because even a fool with only a rudimentary knowledge of the English language could catch that! I would ask what you would expect most people to think, but you will likely hide behind something to the effect of you not being able to help the person who is stupid enough to not read the terms of a semi-binding license agreement and that you have deceived no one in any way... technically. And, in most cases, YES people should read license agreements but when you put 'This extension does not capture any information or usage analytics at all.' in the very next line just below the link to your agreement, well, let us just say that it IS most certainly more than enough to turn around and bite you and were it a more serious matter, while you certainly could win, there is more than a shadow of a doubt that you are being purposely deceptive.
As another 1-star review stated, you collect and sell users' personal information, and yet you state that you thought you were being very up front, very clear about the fact that you do. Tell me then, on your MAIN PAGE in Mozilla Extensions, are you saying that you are being up front about it just because the LINK TO your license agreement is listed just above the following? "This extension does not capture any information or usage analytics at all." Can you REALLY not see how people would be lulled into a false sense of security by the above-quoted statement? And please: DON'T come arguing semantics just because the word 'collect' is absent, when the word 'capture' in the quoted statement in question is used instead, because even a fool with only a rudimentary knowledge of the English language could catch that! I would ask what you would expect most people to think, but you will likely hide behind something to the effect of you not being able to help the person who is stupid enough to not read the terms of a semi-binding license agreement and that you have deceived no one in any way... technically. And, in most cases, YES people should read license agreements but when you put 'This extension does not capture any information or usage analytics at all.' in the very next line just below the link to your agreement, well, let us just say that it IS most certainly more than enough to turn around and bite you and were it a more serious matter, while you certainly could win, there is more than a shadow of a doubt that you are being purposely deceptive.