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Stylish Tools Requires Restart

Quicker access to several Stylish features through a toolbar button and/or keyboard shortcuts. Available for Firefox, Thunderbird, and SeaMonkey

Rated 4 out of 5 stars (3)
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Works with Thunderbird 17.0 - 31.0a1
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JavaScript Object Examiner Requires Restart

Display JavaScript object methods and properties for any available scope.

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Works with Thunderbird 14.0 - 16.*
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Mozilla Labs - Jetpack Prototype Requires Restart

Jetpack Prototype is an experiment in making it easy to build Firefox add-ons using common web technologies.

Rated 4 out of 5 stars (27)
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Works with Thunderbird 3.0b3 - 3.0.*
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CodeHighlight Requires Restart

highlight code in email.

Rated 3 out of 5 stars (1)
1 user

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Works with Thunderbird 1.5 - 60.*
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Send to xNode Requires Restart

Sends content to xNode for analysis. Provides information on domain names, IP addresses, eMail addresses, certificates and much more.

Rated 5 out of 5 stars (1)
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Works with Thunderbird 5.0 - 31.*
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Console² Requires Restart

Console² (pronounced Console Squared or Console Two) replaces the JavaScript Console with what could be the next generation Error Console. From v0.5 includes the Console Filter extension previously available separately from the Console² website.

Rated 5 out of 5 stars (47)
5 users

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Works with Thunderbird 3.0 - 15.0a1
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Mail Extractor

Mail Extractor for Thunderbird quickly extracts and copies email addresses from selected messages. It now also downloads attachments as ZIP files.

Rated 4 out of 5 stars (7)
639 users

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Works with Thunderbird 128.0 - *
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