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Extensions 
Chrome
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select chrome_id_no,plugin_tag_line,plugin_name,plugin_icon,sitemap_url,oldvsnew_comment from final_chrome_totaldata_sept2022 where MATCH(plugin_name) AGAINST('+api +testing' IN Boolean MODE) order by users desc
NWEA Secure Testing
The NWEA™ Secure Testing app provides students the ability to complete our K–12 assessments in kiosk mode using Chromebooks®. We…
axe DevTools - Web Accessibility Testing
Accessibility Checker for Developers, Testers, and Designers in Chrome
Mobile simulator - responsive testing tool
Smartphone and tablet simulator on computer with several models to test mobile responsive websites.
BlazeMeter | The Continuous Testing Platform
Record Selenium and HTTP traffic to create a load and functional tests in less than 10 minutes (Apache JMeter Compatible).
Viewport Resizer – Responsive Testing Tool
Responsive design testing tool to test any website’s responsiveness – it only takes 2 seconds! Emulate various screen resolutions.
Loop11 User Testing
The Loop11 extension lets you participate in usability tests & is only active whilst completing a test for which you’ve opted in.
Testing Playground
Simple and complete DOM testing playground that encourage good testing practices.
Browserling - Cross-browser testing
Cross-browser test websites in the most popular browsers such as Internet Explorer, Chrome, Firefox, Safari and Opera. Try for free!
UXPin Usability Testing (beta)
Would you like to know how users perceive your design? Just create a session, record it and observe users' behaviour.
vREST - REST API Testing Tool
vREST is an automated REST API Testing Tool. This extension records HTTP requests and their responses in vREST application.
Lean Testing instant bug report
Use the Lean Testing extension to instantly take screenshots, make annotations and report bugs.
Crowdsourced Testing instant bug report
Use the Crowdsourced Testing extension to instantly take screenshots, make annotations and report bugs.
QMetry for Jira (QTM4J) - Exploratory Testing
QMetry Test Management for Jira - Exploratory Testing add-on is designed to empower users to carry out Exploratory Testing.
VIEWTEST - Amazon Image Testing Tool
The testing tool will allow the user to enter their own product main picture and to see it as if it was selling on amazon.
CloudQA | The Functional Testing Cloud
Automate your browser tests in 10 minutes, run them in cloud with CloudQA
Lean Testing
Lean Testing is a free hosted bug tracking and test case management application for highly productive development teams.
Sitecore Analytics Testing Tools
An extension for clearning analytics-related cookies and specifying a forwarded IP address for GeoIP lookups
StriveCast Silent Testing
This extension executes the silent tests scheduled at the portal. It is preconfigured for your specific account.
Responsive Testing
Responsive Testing, prueba tu sitio web en las medidas de los dispositivos moviles.
Load Testing in the Cloud from LoadFocus.com
Free Cloud Website and API Load Testing extension for creating and running free website and API load tests.
McGaw.io AB Testing Tracking Tool
This extension allows you to calculate the statistical significance & conversion rate of your A/B tests.
LoadFocus | JMeter Load Testing in the Cloud
LoadFocus | Free Apache JMeter Cloud Load Testing extension for recording and running JMeter load tests for website and APIs.
SpiraCapture - Exploratory Testing Tool
Record exploratory testing sessions and integrates with Spira
QMetry Test Management Exploratory Testing
Test while you Explore. Save efforts with Automated documentation. Report Bugs with screen shots and reduce streamline communication