Right Click Validator

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

AMP Validator

Automatically checks each page for AMP validation.

Rating: Total number of ratings: 1

SEO Wykop - wycena stron, analiza SEO

Rating: Total number of ratings: 1

.no { CSS }

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

Rating: Total number of ratings: 7

Wayback machine website

Online service that have 452 billion web pages saved over time and who is domain tool in context menu

Rating: Total number of ratings: 3