by kimji86

11 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,793 reviews

2,317,059 users

Firebug integrates with Firefox to put a wealth of development tools at your fingertips while you browse. You can edit, debug, and monitor CSS, HTML, and JavaScript live in any web page...

Web Developer by chrispederick

Rated 5 out of 5 stars 217 reviews

555,467 users

The Web Developer extension adds various web developer tools to the browser.

ColorZilla by Alex Sirota

Rated 5 out of 5 stars 305 reviews

295,325 users

Advanced Eyedropper, Color Picker, Gradient Generator and other colorful goodies...

Html Validator by Marc Gueury

Rated 4 out of 5 stars 200 reviews

57,426 users

HTML Validator is a Mozilla extension that adds HTML validation inside Firefox and Mozilla. The number of errors of a HTML page is seen on the form of an icon

For Online HTML 5 validation, you need 0.962

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 65 reviews

139,055 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

Pixel Perfect by Mike Buckley, Lorne Markham, others

Rated 4 out of 5 stars 101 reviews

14,026 users

Pixel Perfect is a Firefox extension that allows web developers and designers to easily overlay a web composition with semi-transparent layers (images). These layers can be consequently used for per pixel comparison between the page and a layer.

View Source Chart by Jennifer Madden

Rated 5 out of 5 stars 108 reviews

14,900 users

Inspect the DOM at lightning speed.

WCAG Contrast checker by Rumoroso

Rated 4 out of 5 stars 9 reviews

4,515 users

Checks for compliance with the contrast levels, brightness and shine in the color combination of foreground and background of textual content based on the requirements of WCAG 1 and WCAG 2.

HeadingsMap by Rumoroso

Rated 5 out of 5 stars 15 reviews

3,598 users

The extension generates a documentmap or index of any web document structured with headings and/or with sections in HTML 5. It shows the headings structure, the errors in the structure (ie. incorrect levels), and it works as HTML5 Outliner too.

WAVE Toolbar by WebAIM

Download Now


Rated 4 out of 5 stars 21 reviews

4,602 users

WAVE Web Accessibility Evaluation Toolbar

Juicy Studio Accessibility Toolbar by Gez Lemon

Download Now


Rated 5 out of 5 stars 14 reviews

2,197 users

The toolbar enables developers to examine WAI-ARIA live regions roles and properties, examine data tables, and determine if the colour contrast is sufficient.

What are Collections?

Collections are groups of related add-ons that anyone can create and share.

Explore Collections

More by this User

See all collections by this user

Recently Viewed