Website performance scores at your fingertips
Have the most comprehensive performance metrics always by your side:
- how a web page lives up to quality standards
- how discoverable it is for search engines
- if it meets accessibility standards

Siteimprove Browser Extension - Website Performance Scores
Siteimprove Browser Extension is a Firefox add-on that provides comprehensive performance metrics for websites, including quality standards, discoverability for search engines, and accessibility.
Add-on stats
Manifest V2
By: Siteimprove
Rating: 1.67
(6)
Weekly download count: 4
Firefox on Android: No
Permissions:
- cookies
- tabs
- activeTab
- storage
- webRequest
- webRequestBlocking
- *://*.siteimprove.com/*
Size: 43.49K
Email: ex*****@siteimprove.com
URLs: Website
Full description: See detailed description
Ranking
Other platforms
Not available on Android
Not available on Edge
User reviews
Doesn't really work. I have a Siteimprove account as a web developer at my workplace (a university) and none of the pages I browse to with it are giving any info from Siteimprove. They all say "No DCI score to show This page is not part of your Siteimprove subscription." The Google Chrome accessibility checker works well, but needs to be ported to Firefox!
by dalemoore, 2021-02-05
Need an account and when came to siteimprove.com/en/pricing/ see a form in an iframe … How they can give advice on accessibility …
by shnoulle, 2020-09-22
I'm not sure why the Firefox version of the extension needs an account and logon, which means you have to request their demo, when the Chrome version just works without jumping through hoops. Really? I need a demo for FireFox to show me how to click the extension button because Chrome users are so smart they don't need to go through the demo... So... that is straight up discrimination towards FireFox users. Ironic.
by Firefox user 16228669, 2020-08-17
Add-on safety
Risk impact
Siteimprove Browser Extension requires a few sensitive permissions. Exercise caution before installing.
Risk impact analysis details
- Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- Low ******* ****** ** *** ********* ******** ***************
Risk likelihood
We don't have sufficient data to confidently determine the risk likelihood of Siteimprove Browser Extension. Use it at your own risk.
Risk likelihood analysis details
- High This extension has low user count. Unpopular extensions may not be stable or safe.
- Medium **** ********* *** *** **** *******
- Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
- Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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