Colored Diffs Version History

16 versions

Be careful with old versions!

These versions are displayed for reference and testing purposes. You should always use the latest version of an add-on.

Version 2.1.1 121.8 KiB Works with Thunderbird 78.4.0 and later

- Fix a bug where HTML-like tags (HTML, XML, etc.) in a diff would not be rendered correctly (
- Embed highlight.js v10.5.0 (No visible change expected)

Version 2.1.0 121.2 KiB Works with Thunderbird 78.4.0 and later

This version embeds highlight.js v10.4.0, which comes with improved support for the diff language, in particular for patches generated with Git.

It also adds two new color themes, StackOverflow Light and Dark.

Version 2.0.1 119.1 KiB Works with Thunderbird 78.4.0 and later

Fix the minimal version number required for using the add-on, now that 78.4.0 can be used [0].


Version 2.0.0 119.1 KiB Works with Thunderbird 78.0 and later

v2: Port to TB 78.4+/82+, rewrite add-on from scratch, use highlight.js

The new version of the add-on is a pure MailExtension that should be compatible with new Thunderbird versions. It relies on the messagesModify API that appeared in Thunderbird 82, but has since been backported to version 78.4 [0].

The add-on was entirely rewritten from scratch, and with a different approach. We no longer parse and reformat the diffs: Instead, we embed and inject the highlight.js library that takes care of coloring the diff [1].

Consequences and main changes:

- We loose some accuracy, because we do not rely on "what part of the diff we are in". Concretely, all lines starting with "+" or "-" will be colored, even if in the commit log.

- We gain in stability, with less parsing susceptible to break.

- We loose the different modes, unified / context / side-by-side. The diffs are not rewritten, we simply add colors.

- We keep the ability to replace tabs and spaces, but loose the line numbers.

- It is not possible at this time to specify custom colors for the diffs, but we can pick a style amongst the hundred or so that are supported by highlight.js.


Version 1.9 56.7 KiB Works with Thunderbird 68.0 - 73.0

Compatibility for Thunderbird 68.

Note that the pop-up dialog for the settings has been temporarily deactivated (it has not been fixed for the latest Thunderbird yet). Use the default options, or edit them through Thunderbird's config editor (search for “extensions.diffColorer”).

Version 0.9 56.6 KiB Works with Thunderbird 31.* - 60.*

- Enhancement: the add-on should now work with email coming from Microsoft Exchange accounts.

Thanks to Piotr Piórkowski for the patch!

Version 0.8 56.6 KiB Works with Thunderbird 31.0 - 60.*

* Upgrade add-on for compatibility with Thunderbird 57~60.
* Change license (MPL v2 instead of MPL v1)
* Minor fixes:
* Fix handling for Git send-mail “information” line
* Fix (somewhat) patches with blockquotes
* Fix printing of whitespaces characters

Known issues:
* Blockquotes in patches look weird with a big line spacing length (are they preformatted?)
* Settings menu for choosing colors for diffs is broken on Thunderbird 59+

Version 0.7 58.8 KiB Works with Thunderbird 38.0 - 58.0

Add-on changed maintainer, and so this new version has a number of changes.

Summary for main differences:
- Compatibility with recent Thunderbird versions (38.*, 45.*).
- Changed packaging process. No more omni.jar file.
- Drop support for Seamonkey suite, at least for now. Should be easy to add again if some Seamonkey user can test compatibility.

Minor differences include:

- Fix a couple of bugs.
- Change default color theme.
- Add preferences for symbols for drawing tabs and spaces.
- Some file / code cleanup.

See individual commits for details (

Version 0.6.2010. 49.0 KiB Works with SeaMonkey 2.0a2 - 2.0.*, Thunderbird 3.0a1pre - 3.1.*

Version 0.6.2010. 41.0 KiB Works with SeaMonkey 2.0a2 - 2.0.*, Thunderbird 3.0a1pre - 3.0.*

Version 0.5.171 41.0 KiB Works with SeaMonkey 2.0a2 - 2.0a3, Thunderbird 2.0 - 3.0b1

Support for Thunderbird 3 and SeaMonkey 2.
Couple of new corner cases working now.
Ability to change tab size.
Generally just a little bit better.

Version 0.4.2 39.0 KiB Works with Thunderbird 1.5 - 2.0.0.*

it's working with multipart messages from now on,
fixed small issues with parsing if log message has series of --- or === chars,
restore links and smileys in log message

Version 0.4.1 39.0 KiB Works with Thunderbird 1.5 - 2.0.0.*

Just fixed one issue with HTML diffs interpreted by Gecko engine sometimes.

Version 0.4 38.0 KiB Works with Thunderbird 1.0 - 2.0.0.*

This version is a lot better than previous one in parsing all the kinds of mail with patches inside and it also has some new usability enhancements as an ability to show line number in front of each code line for example.

Version 0.3.6 16.0 KiB Works with Thunderbird 1.0 - 2.0.0.*

Supports only unified diff format yet.

Version 0.2.1 11.0 KiB Works with Thunderbird 1.0 - 1.5.0.*