* {{addon|theme-font-size-changer|Theme Font & Size Changer}}
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=== Earlier, works with compatibility override (or with ACR) ===
* {{addon|display-mailing-list-header|Display Mailing List Header}}
== External Sources ==
Please list name, version and source (plus extra info). Please check AMO for experimental versions before adding to this list. Note that starting with SM 2.8, add-ons are compatible by default, i.e. any add-on that is at least compatible with SM 2.1 or Toolkit 2.0 is compatible unless it explicitly opts out of compatible-by-default through either its install.rdf or AMO entry. The following list assumes this new compatibility checking which will soon be the default. For earlier version of SeaMonkey, you might need to install the {{addon|add-on-compatibility-reporter|Add-on Compatibility Reporter}} add-on before installing any of these add-ons.
* [http://xsidebar.mozdev.org/modifiedmisc.html#saveasimage Abduction! (Save As Image)] 2.026
Please list name, version and source (plus extra info). Add-ons under this category are declared compatible with an older SeaMonkey version like 2.0 but should still work with newer versions.
Please list name, version and source (plus extra info). See [https://developer.mozilla.org/En/Extensions_support_in_SeaMonkey_2 Extensions support in SeaMonkey 2] for an install.rdf modification example.
* {{addon|back-to-top|Back to Top}} 6.0.1
* {{addon|bugzilla-helper|Bugzilla Helper}} 0.4.3
* {{addon|click-to-play-per-element|Click-to-play per Element}} 0.0.3.20130818 ''restartless''
** [http://users.skynet.be/antoine.mechelynck/other/click_to_play_per_element-0.0.3.20130818-fx+sm.xpi Version with SeaMonkey added to install.rdf] '''—untested—'''
* BetterPrivacy 1.68 ''Developer has dropped all SeaMonkey support. Lewis Rosenthal created BetterPrivacy 1.68.m which is compatible with SeaMonkey. It is available at ftp://ftp.2rosenthals.com/pub/Mozilla/Extensions/modified-for-SM-2.x/betterprivacy-1.68.m-fx+sm.xpi.''
* Duplicate Contact Manager ''stopped working''
* MailNews Sync ''needs adaptations to new add-on module handling and/or Sync changes; abandoned by author''
* Menu Editor ''?''
* Orbit 3+1 theme ''maintainer time constraints''
* xSidebar ''maintainer time constraints''
* Remove It Permanently ''stopped working''
* Fontinfo (Font Information) ''No addons.mozilla.org version works with SeaMonkey. This is NOT a install.rdf issue. Neil Rashbrook tweaked Fontinfo 0.1 to work with SeaMonkey. It is at http://neil.rashbrook.org/%7B70ded480-0a45-4099-84d1-65aa1cb1575e%7D.xpi, but no effort has yet been made to make those tweaks for Fontinfo 0.2 or incorporate them into the "official" extension.''