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.
8,780 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...
115,251 users
defyFormValidation
Deactivates HTML5 form validation for testing server-side or alternative client-side (e.g. JavaScript-based) validation methods.
143 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
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.
16 users
Mail Validator
Mail validator is used to validate email. Functionality to check deliver-ability,valid format, free mail, disposable mail
4 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.
53 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
Validate HTML
"Validate HTML" is a powerful Firefox addon designed to streamline the process of validating HTML code directly within the browser. With this addon, users can quickly check their HTML markup for errors and compliance with web standards
1 user
ChroPath
ChroPath helps to generate and validate selectors like relative xpath, cssSelector etc with iframe support.
4,991 users
Topic validation
Helper for hyperskill topics creation
2 users
Code Editor
Powered by the Monaco Editor, it provides support for basic syntax colorization, IntelliSense, validation and Diff Editor features.
501 users
(X)HTML5 Checker
A small extension to validate the markup of current webpage
124 users
Узнай кто перекуп | (validauto.ru)
Перекупы авто, проверь объявления. Узнай кто перекуп.
18 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.
109,645 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.
8,603 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.
210 users
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.
1,240 users
Validate Local CSS Records
This extension validates local CSS records on webpages.
0 users
Brazilian Portuguese Dictionary (Former Spelling)
The same spellchecker shipped with the Brazilian version of Firefox, just using the former spelling (valid until January 1st 2016).
1,822 users
Zulu
Searches webpages for valid phone numbers and turns them into tel links or sends them directly to the Zulu client application itself
64 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.
1 user
Link Validator
Verify the validity of all links on a webpage.
0 users
Email Verifier by ZeroBounce
Official Firefox extension to validate email addresses using the ZeroBounce API.
13 users
security extension of Agricultural Bank of China
This extension is kind of security control. it is used for the users of the Agricultural Bank of China to log onto the online bank,verify the computer,verfiy the signature of their own certificates,download the valid certificates etc.
2,217 users