!Firefox

by claudioif

8 Add-ons in this Collection

Firebug by Joe Hewitt, Jan Odvarko, others

Rated 5 out of 5 stars 1,837 reviews

2,203,223 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...

FlashGot Mass Downloader by Giorgio Maone

Rated 5 out of 5 stars 536 reviews

801,159 users

Download all the links, movies and audio clips of a page at the maximum speed with a single click, using the most popular, lightweight and reliable external download managers.

Web Developer by chrispederick

Rated 5 out of 5 stars 235 reviews

488,333 users

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

Xmarks Sync by Xmarks Inc.

Rated 4 out of 5 stars 2,557 reviews

322,175 users

Xmarks is the #1 bookmarking and open tab add-on. Keep your bookmarks, and open tabs backed up and synchronized across computers and browsers. Mobile phones with Premium access. Utilize LastPass to sync passwords!

MeasureIt by Kevin Freitas

Rated 4 out of 5 stars 354 reviews

144,684 users

Draw a ruler across any webpage to check the width, height, or alignment of page elements in pixels.

Fast Dial by telega

Rated 3 out of 5 stars 2,516 reviews

114,879 users

Visual bookmarks for Firefox.

WorldIP - Geo Add-on with Security Features by Alrond

Rated 5 out of 5 stars 121 reviews

36,114 users

Professional Geo Add-on with security features and advanced network tools. Anti-phishing. Protection against DNS spoofing and fake sites. All DNS records for domain. The real location of web server, country flag, extended information about datacenter

Easy DragToGo by Sunwan

Rated 5 out of 5 stars 355 reviews

1,770 users

Note from Mozilla: This add-on has been discontinued. Try DragIt instead.

Allows you to open links in new tabs, and do more with drag and drop gestures easier.

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

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