Hello,
Norton installs the extension using the third party installation method.
Here’s an explanation and a that I gave in an older thread. Let us know if this helps you solve your issue.
George-Silviu Blendea post:3:
Hello,
You mention that the extension is not listed in the Add-ons manager andso it seems there are two issues.
The first issue is related to the way the add-on is installed. Roboform is installed as a third party application and its add-on is installed to a location specific to Mozilla Firefox. Even if we changed IceDragon so that it reads the add-on data from the default location used by Firefox, Roboform would not add the extension there unless Firefox is already installed on the system.
When Firefox is installed, Roboform uses the following registry location to set the extension details: HKLM\Software\Mozilla\Firefox\Extensions. To make IceDragon detect the extension correctly you have to create the following registry location: HKLM\Software\Comodo\IceDragon\Extensions and add the corresponding value from Firefox. When you launch IceDragon the next time it will load the Roboform add-on (it should also be present in the Add-ons manager).
The real solution for this issue would be to ask the Roboform developers to include IceDragon support into their application. This has been done in the past for CCleaner .
Regards.