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.
7,163 users
BF3 Battlelog Player Count Validator
Displays accurate player count in Battlefield 3 battlelog server list
167 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.
132,656 users
HTML, CSS, JS Validator
The utility checks and fixes HTML, CSS, and JavaScript errors on websites.
1 user
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.
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.
8 users
HTML Validator Plus
Use an online HTML checker to check your HTML code. Use a syntax checker as an HTML error checker
7 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
2 users
Mail Validator
Mail validator is used to validate email. Functionality to check deliver-ability,valid format, free mail, disposable mail
2 users
Country Flags & IP Whois
Displays country flag of website's server location, Whois and Geo info on a browser addressbar icon
5,748 users
Code Editor
Powered by the Monaco Editor, it provides support for basic syntax colorization, IntelliSense, validation and Diff Editor features.
701 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
SEOInfo
Shows SEO issues as you navigate pages. Displays performance data, redirects, structured data and errors for HTML pages. Save to Excel.
328 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.
167 users
Email Validator
Validate emails, check deliverability, and filter out blacklists, spam traps, and complainers to reduce bounce rates.
0 users
