Firefox & Thunderbird Add-on Converter for SeaMonkey

User Help for Seamonkey and Mozilla Suite
Posts: 250
Joined: January 20th, 2015, 12:29 pm

Post Posted October 26th, 2017, 6:12 am

I've been working on this over the past week (thanks RrBd for suggesting it). This will get the extension working again.

  • A workaround with setTimeout to make sure this script runs after Mozilla's, not before
  • For WebExtensions, it will show a message and suggest you look at old versions
  • Added converter links on the versions page
  • Very minimal support for the new AMO ( ... zilla-org/)

I'll try to get this new version uploaded to AMO later today.

Posts: 250
Joined: January 20th, 2015, 12:29 pm

Post Posted October 28th, 2017, 2:53 pm

I've uploaded version

(I also briefly uploaded a by accident, but that wasn't any different from

There's also a beta version available. It adds support for the new version of the Firefox Add-ons site.

Posts: 21
Joined: February 25th, 2015, 1:21 am

Post Posted November 1st, 2017, 8:41 am

Hi all,

Isaac created a new version 0.9.17rc1 with several improvements. I suggest to test it few days (until Weekend) before he uploads it to AMO.



Posts: 6
Joined: April 11th, 2017, 8:04 am

Post Posted November 17th, 2017, 11:04 am

It seems that doesn't convert the newer WebExtensions .xpi Firefox add-ons to be compatible with SeaMonkey 2.48. It just says "install.rdf not found in installer". Is there a way to fix that? Thanks.

Frank Lion

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Joined: April 23rd, 2004, 6:59 pm
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Post Posted November 17th, 2017, 11:37 am

js017 wrote:Is there a way to fix that? Thanks.

Nope and even if it did then SeaMonkey wouldn't be able to use those WebExtensions.
Metal Lion latest SeaMonkey & Thunderbird Themes - Sea Monkey and Silver Sea Monkey
"The only thing necessary for the triumph of evil, is for good men to do nothing." - Edmund Burke (attrib.)

Posts: 14
Joined: July 19th, 2009, 3:56 pm

Post Posted November 17th, 2017, 9:15 pm

Changes, please, to the list of converted extensions

One update, eight additions.

Copy Title 1.1.1 ... d.1-signed

Copy Title and URL 1.0 ... ersion-1.0

  • tested by me, not compatible.

FireTitle ... :FireTitle

Minimap Scroller Sidebar ... structions

  • 0.2 tested by me, not compatible.

pdfit 1.15 ... d.1-signed

  • tested by me, compatible.

Scroll Highlight 0.4 ... d.1-signed

  • tested by me, not compatible.

Scroll Position Highlight 1.9 ... ersion-1.9

  • tested by me, not compatible.

ScrollMap 0.9 ... d.1-signed

Tab Groups 2.1.4 ... sion-2.1.4

  • tested by me, not compatible – sorry.


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Post Posted November 18th, 2017, 7:34 am

URL Tooltip 1.3 works with SM 2.49.1. ... l-tooltip/
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Posts: 1
Joined: January 6th, 2018, 1:32 pm

Post Posted January 6th, 2018, 1:50 pm


Tryed the converter to convert Firefox SuperStart add-on.
Everything seems ok. Except import/import.
Got the following message:
XML Parsing Error: undefined entity
Location: chrome://superstart/content/export-import.xul
Line Number 13, Column 1:<dialog title="&superstart.export; / &superstart.import;"

What is the undefined entity: dialog ?, title ? ???
Where is it supposed to be defined ?
How to correct this ?


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