Extensions by Weekly Downloads
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AutoCopy_rebirth Requires Restart
Lightweight add-on that automatically copies any highlighted text to clipboard.
Download Timestamp Requires Restart
Sets downloaded file's modification time to current time in Firefox 4.0 and SeaMonkey 2.1.
SeaMonkey Update Server Cert HotFix Requires Restart
Adds the current Certificate used by the Official Update Server to SeaMonkey's acceptable list.
Google+ Share for SeaMonkey Requires Restart
Share a URL in Google+ directly from SeaMonkey
MoveThrobber Requires Restart
Move SeaMonkey's throbber from the Toolbar to the Menubar.
FireWebSSO Requires Restart
Secure remote storage of your personnal passwords, bookmarks and notes, crypted by your navigator. Auto-login, auto fill, auto detect authentication forms or HTTP-authentication, Single Sign-On, always synchronized with all your firefox navigators.
Replace Quotation Marks Requires Restart
Replace quotation marks from " ", ' ' to „ ” , ‚’ in text areas.
Metal Lion Image Saver Requires Restart
Single-click access to common actions for images (e.g. saving, copying, printing)
Cache Offline Alert Restorer Requires Restart
Restores the alert when a website asks to store data for offline use.
Share to Google+ Page Requires Restart
Share to your Google+ Profile or Google+ Page with just click of a button.
Custom Sender Address and Reply Requires Restart
Select sender mail address based on the recipient and reply with the same address
MailNews Sync Requires Restart
New mailnews sync engine for Seamonkey and Thunderbird. Requires Firefox Sync extension.
To create your own collections, you must have a Mozilla Add-ons account.