Html Validator
HTML Validator is a Mozilla extension that adds HTML validation inside Firefox, Mozilla. The number of errors of a HTML page is seen on the form of an icon For Firefox 56, use 0.974 (see all versions below). For Firefox 57, see Web Extensions.
8,426 users
Flagfox
Displays a country flag depicting the location of the current website's server and provides a multitude of tools such as site safety checks, whois, translation, similar sites, validation, URL shortening, and more...
113,139 users
eIDAS QWAC Validator
This add-on shows a grey EU-flag badge at the right of the address bar, that gets coloured in case the origin of the visited site is authenticated by means of a qualified web-access certificated (QWAC) pursuant to the “eIDAS” European Regulation.
15 users
defyFormValidation
Deactivates HTML5 form validation for testing server-side or alternative client-side (e.g. JavaScript-based) validation methods.
142 users
Mail Validator
Mail validator is used to validate email. Functionality to check deliver-ability,valid format, free mail, disposable mail
3 users
Validate Phone Number
Validate phone numbers effortlessly with our Phone Number Validation browser extension. This extension provides a seamless way to verify phone numbers, check carriers, and obtain essential details like location and phone type.
7 users
Form Validator Enhancer
Adds advanced validation features to the Accessible Form Helper.
1 user
Link Validator
Verify the validity of all links on a webpage.
1 user
ValidateX - HTML & XML Validator
Validates HTML and XML markup against W3C standards
1 user
Trust URI Validator Extension
Validates Trust URIs as specified in Internet-Draft Organization Trust Relationship Protocol
1 user
HTML, CSS, JS Validator
The utility checks and fixes HTML, CSS, and JavaScript errors on websites.
1 user
ChroPath
ChroPath helps to generate and validate selectors like relative xpath, cssSelector etc with iframe support.
5,572 users
Accessibility Validator
The Accessibility Validator Firefox add-on is an essential tool for web developers and designers committed to ensuring their websites are accessible to all users. With its comprehensive suite of accessibility checks, this add-on quickly scans web
1 user
Code Editor
Powered by the Monaco Editor, it provides support for basic syntax colorization, IntelliSense, validation and Diff Editor features.
585 users
Topic validation
Helper for hyperskill topics creation
2 users
Validate HTML
Submits the HTML of the current tab to the W3C Validator. Source submitted is from a GET request not the DOM. Written out of the need to easily validate protected directories. Not advisable for use on pages with sensitive information.
57 users
10 users
(X)HTML5 Checker
A small extension to validate the markup of current webpage
109 users
Узнай кто перекуп | (validauto.ru)
Перекупы авто, проверь объявления. Узнай кто перекуп.
17 users
Stylus
Redesign your favorite websites with Stylus, an actively developed and community driven userstyles manager. Easily install custom themes from popular online repositories, or create, edit, and manage your own personalized CSS stylesheets.
108,443 users
Avast SecureLine VPN
Control your Avast SecureLine VPN from the comfort of your browser. Easily turn your VPN on and off, or change your server location, with our simple but powerful extension. All you need is Avast SecureLine VPN with a valid license.
8,271 users
CSS Validation Checker
The CSS Validation Checker addon for Firefox is a powerful tool for web developers and designers. It seamlessly integrates into the browser, allowing users to quickly validate their CSS code against the latest standards set by the W3C.
2 users
Validate CSS
The Firefox addon "Validate CSS" is a handy tool for web developers and designers. It allows users to quickly validate their CSS code directly within the browser, ensuring it meets industry standards and is free of errors. With its simple interface
1 user
Web Developer Form Filler
This extension is used by developers to make it easy to save and fill forms for use in submission testing and validation.
1,433 users
SEO Audit Tool
Website analysis & SEO tool by iwebchk provides comprehensive website review in SEO, performance, validity, security, accessibility, social media, backlinks, visitors, technologies and usability.
201 users