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Open Multiple Locations

Adds a "File" menu option to open multiple locations at a time.

Rated 4 out of 5 stars (20)
4,791 users

Open Play No Restart

Расширение дает возможность переходить по ссылкам забаненых сайтов, если такие сайты имеют зеркала.

Not yet rated
19 users

Open Play Store with toolbar button

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 preset URL in Private Browsing window No Restart

Display a toolbar button to open a preset URL in a new Private Browsing window.

Icon by Aha-Soft (http://www.aha-soft.com/), published under the CC Attribution 3.0 United States License.

16px version downscaled by aviav.

Not yet rated
16 users

Open Private Links No Restart

Abre los links desde el click derecho en modo privado.

Not yet rated
20 users

Open Profile Folder

Open current profile folder from "Tools" menu or toolbar button.

Rated 4 out of 5 stars (17)
2,385 users

Open RegEdit Key No Restart

[WINDOWS ONLY] Open selected registry key directly in the registry editor from context menu.

Rated 4 out of 5 stars (5)
319 users

Open Rewrite Firefox Extension No Restart

Adds Ctrl + I hotkey (keyboard shortcut) to go to other search engine. Adds Ctrl + M to go to modify search query. This extension is aimed to be used with OpenRewrite.com search engine.

Not yet rated
1 user

Open Search Notification

The Open Search plugin notification was removed for Firefox 4 (Bug 430627).
This Addon gives Firefox 4 a Open Search notification just like Firefox 3.6 has.

Rated 4 out of 5 stars (2)
122 users

Open Secure

Adds the ability to open a non-secure URL by applying the secure https protocol.

Rated 3 out of 5 stars (2)
121 users

Open Selected Links No Restart

Adds context menu items to open multiple selected links or selected text URLs in new tabs.

Not yet rated
14 users

Open Serial Tabs

Create Serial Tabs with Load-Ahead Preparation from Bookmarks for Instant Viewing

Not yet rated
46 users

Open Some Bookmarks

This extension creates a new Bookmarks sub-Folder PopupMenu Item which opens a specified number of Bookmarks listed in the folder, while only loading (not opening) any remaining Bookmarks, all in new Tabs.

Rated 5 out of 5 stars (2)
82 users

Open sync tabs button

Just a button that opens synced tabs in a new tab.

Rated 4 out of 5 stars (5)
179 users

open tab count widget

Displays the total number of open tabs (in all windows & tabgroups) in the addon-bar. Can be moved to any toolbar. Very bare-bones, no preferences.

Rated 3 out of 5 stars (15)
458 users

Open Tabs Next to Current No Restart

Open new tabs always to the right of the current one.

Rated 5 out of 5 stars (16)
3,364 users

Open Tabs Next to Current Plus No Restart

Opens all new tabs always next to the current tab except when a new tab is created either by new tab button or hotkey (Default Ctrl + Shift + Alt + T).

For Issues/Bugs;
https://github.com/Nidre/firefox-open-tabs-next-to-current-plus/issues

Not yet rated
204 users

Open Tags!

Makes easier to open tagged bookmarks.

Rated 3 out of 5 stars (1)
55 users

Open TortoiseSVN

This Firefox add-on enables you to open TortoiseSVN directly when you click the link to the registered URLs of Subversion repository.

If the link has some specific attributes, this add-on opens TortoiseSVN repository browser, log or blame viewer.

Not yet rated
611 users

Open Two-Factor Authenticator No Restart

A sync-able open-source two-factor authenticator

Not yet rated
102 users