Web Developer's Toolbox

12 Add-ons in this Collection

Tamper Data created by Adam Judson

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30,748 downloads this week

Rated 5 out of 5 stars 32 reviews

Use tamperdata to view and modify HTTP/HTTPS headers and post parameters...

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YSlow created by Yahoo! Inc.

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22,106 downloads this week

Rated 4 out of 5 stars 28 reviews

YSlow analyzes web pages and why they're slow based on Yahoo!'s rules for high performance web sites. YSlow uses Yahoo!'s Smush.it service, which is subject to Smush.it Terms of Use: http://info.yahoo.com/legal/us/yahoo/smush_it/smush_it-4378.html

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MeasureIt created by Kevin Freitas

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16,449 downloads this week

Rated 5 out of 5 stars 82 reviews

Draw out a ruler to get the pixel width and height of any elements on a...

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ColorZilla created by Alex Sirota

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28,176 downloads this week

Rated 5 out of 5 stars 102 reviews

Advanced Eyedropper, ColorPicker, Page Zoomer and other colorful goodies...

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ShowIP created by Jan Dittmer

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14,943 downloads this week

Rated 5 out of 5 stars 34 reviews

Show the IP address(es) of the current page in the status bar. It also allows querying custom information services by IP (right mouse button) and hostname (left mouse button), like whois, netcraft. Additionally you can copy the IP address to the clipboard. This...

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Greasemonkey created by Anthony Lieuallen, Aaron Boodman, others

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339,455 downloads this week

Rated 5 out of 5 stars 251 reviews

Allows you to customize the way a webpage displays using small bits of JavaScript. ...

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FireFTP created by Mime Cuvalo

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121,322 downloads this week

Rated 5 out of 5 stars 271 reviews

FireFTP is a free, secure, cross-platform FTP client for Mozilla Firefox which provides easy and intuitive access to FTP servers.

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