Add-ons

Custom Buttons by Yan, cubegm, others

Gives a possibility to create custom toolbarbuttons...

Add-ons Manager Context Menu by Zulkarnain K.

Add more items to Add-ons Manager context menu.

Addons Manager Hilite by custom.firefox.lady

Remembers last selected (hilited) extension/theme/plugin/userstyle in Add-ons Manager. Version 3.0 also includes sorting buttons. Turn off/on the add-on selection list box and/or fine tune behavior via its Options.

Lightweight Themes Manager by Zulkarnain K.

Manage your installed personas (lightweight themes).

GitHub Extension Installer by Diego Casorran

Install Browser Extensions straight from GitHub Repositories

JSON Inspector by Zulkarnain K.

Inspect JSON object from a URL or entered data.
Requires either DOM Inspector or DOM Inspector Plus! [dm] extension.

Paste to Tab and Go by Zulkarnain K.

Paste URL or text to any tabs or a new tab and load it immediately, like 'Paste & Go' feature, but unlike 'Paste & Go', this extension will paste text from clipboard to a tab without focusing on the tab first.

[solid] CornFlowerBlue by Zulkarnain K.

Lightweight Themes Preview for SeaMonkey by Zulkarnain K.

Preview lightweight theme when hover on menuitems in Apply Theme menu.

Light Titanium by Zulkarnain K.