W3C Markup Validation Service

CORS Toggle

Adds Access-Control-Allow-Origin, Access-Control-Allow-Methods and Access-Control-Allow-Headers headers for CORS.

Rating: Total number of ratings: 9

Web Developer

Adds a toolbar button with various web developer tools. The official port of the Web Developer extension for Firefox.

Rating: Total number of ratings: 101

.no { CSS }

Opera 12 reminiscent Shift-G CSS zapper (use Alt-G)

Rating: Total number of ratings: 7

Firebug Lite for Opera 15+

Rating: Total number of ratings: 16

Website Color Changer

Extends the Developer Tools, adding a sidebar for colors manipulation

Rating: Total number of ratings: 4