Web Development

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Omnivalidator Requires Restart

Validate content (typically web pages) using any number of configurable validation services, such as the W3C Markup Validator and Validator.nu, and view the validation results in a Firebug-like panel in the browser.

Rated 5 out of 5 stars (1)
154 users

One Click Proxy IP

The easiest way ever to change IP and browse anonymously! Just activate it with one click and it's done, you're browsing the web with a random HTTP or Socks proxy list from several countries in the world. No ads. 100% free to prevent web censorship.

Rated 4 out of 5 stars (38)
24,517 users

One Click Salesforce Login Compatible with Firefox 57+

Enables you to login in SalesForce (Force.com) with one click.

Rated 5 out of 5 stars (6)
41 users

One-click Screenshot Compatible with Firefox 57+

Take screenshots of entire websites. Simple as that.

Rated 4 out of 5 stars (8)
1,686 users

onepgr screen sharing

This Firefox extension is developed for http://onepgr.com/. It doesn't do anything except capture content of your screen.

Not yet rated
5 users

OneTouchSearch Requires Restart

文字列を選択してマウスのミドルボタン(真ん中のボタン)などを押すことで、選択したキーワードを検索バーの検索エンジンで検索してくれるようにします。
さらに、shift,ctrl.altなどと組み合わせることで、複数の検索エンジンを瞬時に切り替えて検索してくれる優れものです。
Logicool社製のマウスドライバーについている「One Touch Search」が4.0で利用できなくなったので、作りました。

Rated 4 out of 5 stars (3)
350 users

Online Lab Compatible with Firefox 57+

List of online resources for developers.

Not yet rated
3 users

online-dictionary

Add on to show meaning of selected word.

Rated 4 out of 5 stars (4)
7 users

Onload Script Some Document Files

Run an external onload script for some documents. Intentionally limited to file URI scheme.

Made to allow processing without need for script reference and onload attribute in the document itself.

Not yet rated
4 users

Ook? Video Ook! Requires Restart

Ook? Video Ook! enables you to download embedded videos from several systems (such as YouTube, Google Video, Pornotube, Metacafe and many more). ...

Rated 3 out of 5 stars (24)
139 users

Open AdWords with toolbar button Requires Restart

This Firefox addon adds an AdWords button to the top toolbar. This AdWords button opens Google AdWords in new tab.

Not yet rated
2 users

Open Analytics with toolbar button Requires Restart

This Firefox addon adds an Analytics button to the top toolbar. This Analytics button opens Google Analytics in new tab.

Not yet rated
50 users

Open in default browser

Open links in default browser

Rated 1 out of 5 stars (1)
25 users

Open in Google Chrome Browser Compatible with Firefox 57+

Open current page or link in Chrome browser

Rated 4 out of 5 stars (3)
394 users

Open in Microsoft Edge™ Browser Compatible with Firefox 57+

Open current page, link, or all tabs in the Microsoft Edge™ browser

Not yet rated
4 users

Open in Tor Browser Compatible with Firefox 57+

Open current page or link in tor browser for better privacy

Rated 4 out of 5 stars (12)
2,009 users

Open in Vivaldi Compatible with Firefox 57+

Open current page, link, or all tabs in the Vivaldi browser.

Not yet rated
2 users

Open Link Host Requires Restart

* Open the link's host in Current Window/New Window/New Tab...

Rated 5 out of 5 stars (3)
29 users

Open Play Store with toolbar button Requires Restart

This Firefox addon adds an Play Store button to the top toolbar. This Play Store button opens Google Play Store in new tab.

Rated 5 out of 5 stars (1)
154 users

Open Two-Factor Authenticator

A sync-able open-source two-factor authenticator

Rated 4 out of 5 stars (7)
1,102 users