SeaMonkey

by Zulkarnain K.

42 Add-ons in this Collection

Private Tab by Infocatcher

Rated 5 out of 5 stars 311 reviews

32,861 users

Adds private tabs.

Custom Buttons by Yan, cubegm, others

Rated 4 out of 5 stars 124 reviews

9,110 users

Gives a possibility to create custom toolbarbuttons...

JavaScript Deobfuscator by Wladimir Palant

Rated 5 out of 5 stars 26 reviews

21,388 users

Important note: This extension will not work in Firefox 57 and above. Providing this functionality in Firefox is no longer possible, the extension is discontinued.

Open in Browser by Rob W, Sylvain Pasche, others

Rated 5 out of 5 stars 70 reviews

5,585 users

Offers the possibility to display documents in the browser window.

Scriptish by Erik Vold, Nils Maier, others

Rated 4 out of 5 stars 109 reviews

17,415 users

The greatest user script engine on the Internet (a fork of Greasemonkey).

DOM Inspector by SeaMonkey Council

Rated 5 out of 5 stars 77 reviews

57,130 users

DOM Inspector is a tool that can be used to inspect and edit the live DOM of any web document or XUL application. The DOM can be navigated using a two-paned window displaying a variety of different views on the document and all nodes within.

PrefBar by Manuel Reimer

Rated 5 out of 5 stars 42 reviews

9,367 users

The all in one toolbar(item). Houses and manages bigger amounts of buttons (Clear Cache, Clear Cookies, ...), Menus (User Agent spoof...) and checkboxes (Javascript, Flash, ...). Extensible from online-database or with self created buttons.

JSONovich by Will Elwood, mjgiarlo

Rated 4 out of 5 stars 47 reviews

4,974 users

Pretty-prints JSON content in the browser for easy, unobtrusive viewing.

Add-ons Manager Context Menu by Zulkarnain K.

Rated 5 out of 5 stars 47 reviews

59,671 users

Add more items to Add-ons Manager context menu.

Stylish Sync by Herrminator

Rated 5 out of 5 stars 31 reviews

1,992 users

Sync engine for Stylish with backup / restore facility.

TabSubmit by Kai Liu

Rated 5 out of 5 stars 14 reviews

1,115 users

Lets the user direct the submission of a form to a new tab or window. [Bug #17754]

Key Manager by Subrata Mazumdar

Rated 3 out of 5 stars 21 reviews

36 users

KeyManager Tool: Firefox Add-on for Key Generation, Certificate Enrollment, CRL Signing, and Identity and Authority Delegation

xSidebar by Philip Chee

Rated 4 out of 5 stars 12 reviews

24 users

Firefox style sidebars for SeaMonkey...

XML Digital Signature Tool by Subrata Mazumdar

XML Digital Signature Tool is a Firefox add-on for processing Digital Signature in XML documents
(Please read the installation instruction in the "Developer Comments" section before downloading)

LCARStrek by KaiRo

Rated 4 out of 5 stars 49 reviews

63 users

This one is a Star Trek theme, using the LCARS interface known of Federation Star Ships (heavily used in The Next Generation and Voyager series). It's got lot of rounded borders and hover (mouse-over) effects, be aware that it may look and feel...
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