Message and News Reading


Perfect View

Image viewer with smooth dynamic zoom, pan and rotate. View slide shows of images or files and capture page elements and tab content. Apply image filters. Save images in various formats.

Rated 4 out of 5 stars (8)
1,669 users
Updated October 20, 2016

Color Transform

Transform the colors of entire web pages or selected elements. Combine predefined themes with basic transforms. Save transforms for specific web domains.

Rated 4 out of 5 stars (18)
2,785 users
Updated October 18, 2016


Colorize entire web pages. Configure themes using sliders and drag-and-drop. Set domain preferences for automatic coloration.

Rated 3 out of 5 stars (9)
1,611 users
Updated October 18, 2016

S3.Google Translator Requires Restart

S3.Google Translator adds the power of Google Translate’s automatic translations to your browser!
It supports translation of selected text, entered phrase or whole webpage between any of 80+ languages.

New Feature: Language learning!

Rated 5 out of 5 stars (380)
382,443 users
Updated October 18, 2016

Reply As Original Recipient Requires Restart

Reply with the From: field set to the To: field from the original email.

Rated 5 out of 5 stars (1)
3 users
Updated October 18, 2016

Open Conversation Button Requires Restart

Adds a toolbar button to open selected email's conversation.

Not yet rated
113 users
Updated October 14, 2016

MailHops Requires Restart

MailHops maps the route an email took to get to you. Displaying the senders location, weather, user-agent and authentication used.

Rated 4 out of 5 stars (27)
3,606 users
Updated October 13, 2016

Classic Pop-up Alerts

This addon returns the old view of the pop-up notifications, as in Firefox 4.0 - 43.0

Not yet rated
622 users
Updated October 13, 2016

Theme Font & Size Changer

Theme Font & Size Changer lets you change the global font size and font family used for the user interface in Firefox. Design your browser with your favorite font.

Rated 5 out of 5 stars (228)
102,994 users
Updated October 12, 2016

PasteHyperlink Requires Restart

Paste the clipboard contents into the selected text as a hyperlink.

Rated 5 out of 5 stars (7)
674 users
Updated October 12, 2016

Reply To All Reminder Requires Restart

Asks for confirmation when "Reply" instead of "Reply to All" is pressed on an email with multiple recipients.

Not yet rated
13 users
Updated October 9, 2016

Get Selected Mails Requires Restart

Gets new messages for selected mail accounts.

Rated 5 out of 5 stars (10)
947 users
Updated October 9, 2016

English - English Dictionary Requires Restart

Important!!! If you can't see the "Abc" icon , please click View --> Toolbars --> Bookmarks Toolbar.

This is an English dictionary for looking up words in English.

Select a word using your mouse and find its meaning in English!

Rated 2 out of 5 stars (9)
5,585 users
Updated October 6, 2016

French Dictionary for Spelling Requires Restart

Supports also the Nighty browser! This is a French Spelling dictionary, for finding spelling mistakes.
Select a text in French appearing on any web page and get a spelling check for it immediately!

Rated 4 out of 5 stars (9)
5,857 users
Updated October 4, 2016

SortPref Requires Restart

Adds the ability to control primary, default sorting and threading options.

Rated 4 out of 5 stars (10)
1,887 users
Updated September 30, 2016

Rspamd-spamness Requires Restart

Rspamd spam filtering system score visualization.

Not yet rated
109 users
Updated September 26, 2016

ThunderTabs Requires Restart

This add-on is a button on your toolbar that lets you open web apps as Tabs in Thunderbird. Use it to load Google Mail, Google Wave, Google Voice, and other "inboxes" (or any url) as tabs within Thunderbird, making it your communications hub.

Rated 4 out of 5 stars (12)
476 users
Updated September 23, 2016

Blend In Requires Restart

Blends in OS-related values in User-Agent HTTP request header & a number of JS properties, so that Firefox (Thunderbird) appears to sites visited as running on the OS being used the most in the world. Thunderbird can also be blended in as Firefox.

Rated 4 out of 5 stars (10)
1,028 users
Updated September 23, 2016

XNote++ Requires Restart

Persistent sticky notes for Thunderbird associated to mails.
This is a port to Thunderbird >= 3 based on XNote 2.1.0 ( ) with bugfixes and additional features.

Rated 5 out of 5 stars (68)
22,158 users
Updated September 18, 2016

YouTube 2 Player

Send YouTube video links to an external player, downloader, etc,

Rated 5 out of 5 stars (4)
1,377 users
Updated September 7, 2016