Welcome to SeaMonkey Add-ons.
Add extra features and styles to make SeaMonkey your own.Close
Up & Coming Extensions
True Full Screen in SeaMonkey No Restart
This extension enables true full screen mode in SeaMonkey for HTML5 video players, slide-shows, etc. and also for full screen invoked manually with the F11 key.
Open With Photoshop No Restart
Open With Photoshop is a new companion for web and graphic designers to open up any web image with Adobe Photoshop via a single and quick mouse click.
Stop Tube HTML5 No Restart
Stops autoplay of YouTube HTML5 videos (WebM). It is Flash-Block equivalent for HTML5 videos.
Encrypt the web! HTTPS Everywhere is a Firefox extension to protect your communications by enabling HTTPS encryption automatically on sites that are known to support it, even when you type URLs or follow links that omit the https: prefix.
An input method editor (IME) for Vietnamese. Type Vietnamese diacritics directly into any Web page, Web app, or dialog box.
Bộ gõ tiếng Việt cho phép đặt dấu trực tiếp vào bất kỳ trang Web, ứng dụng Web, và hộp thoại.
Add-ons Button No Restart
Opens the Add-ons window to perform tasks on your installed Extensions, Themes, Plug-ins and Language packs.
uBlock Origin No Restart
Finally, an efficient blocker. Easy on CPU and memory.
Join partial messages. Somewhat similar to MS Outlook Express "combine and decode".
This wizard creates an XPI that rebrands Firefox, SeaMonkey or Thunderbird. You can change the brand name as well as the brand images and icons.
Configures Mozilla for work with certificates issued by InfoNotary Plc.
Finnish open source Voikko-spellchecker for Mozilla and needed libraries.
Provides transparent proxy authentication on your enterprise network.
Close authentication dialog if login on proxy failed.
Abilita la gestione alternativa degli allegati P7M
Adds a "Print" option to the Right-Click context menu.
uMatrix No Restart
Point & click to forbid/allow any class of requests made by your browser. Use it to block scripts, iframes, ads, facebook, etc.
Adds extension options dialogs to the Tools or Titlebar menu and includes toolbar icon.
LastPass, an award-winning password manager, saves your passwords and gives you secure access from every computer and mobile device.
Quote Colors allows you to select text and background colors of different quote levels which are applied when reading or printing mail/news messages. Additionally, you can choose between graphical and traditional plain text quoting display mode.
Organize your schedule and life's important events in a calendar that's fully integrated with your Thunderbird email. Manage multiple calendars, create your daily to do list, invite friends to events, and subscribe to public calendars.
This add-on is not compatible with your version of SeaMonkey because of the following:
- Add-on has opted into strict compatibility checking.