просто супер!

AInspector runs a comprehensive accessibility check across a single web page. The tool has lots of features but is compact at the same time. I like that the overall report/scan of number of Violations, Passes, etc. gets updated in real time as one interacts with a webpage or as you link to a new web page. The extension is great for sniffing out duplicate IDs which not all tools do. The user interface lets someone drill down into issues from the top level page report. I like the ability to select from the number of violations "V" and then with each click get more information to pinpoint where a page went wrong. Additionally the tool allows someone to visually highlight on the screen where a particular violation exists. There are nice export features and the ability to filter down to a specific ruleset, e.g. A or AA WCAG 2.1

This is easily the most useful accessibility tool I've ever used. I'm using it to help with an app I'm developing right now. Thanks for this addon, it's a life saver.

An easy to use and valuable extension. Strongly recommended for all web content developers to check that their website is meets accessibility guidelines (WCAG). Works with static and dynamic web sites.

Very, very, very handy extension. Looks a bit like Functional Accessibility Evaluator on https://fae.disability.illinois.edu/ , but the interface is much more clear.
Especially all the links under Details are very handy.
Really a great Extension!