Firebreath Plugin not loading in IE 11

Question

I have created a 32-bit plugin using Firebreath framework 1.7.0, and I am trying to run the plugin on a Windows 7 64-bit machine running IE 11. When I launch the web-page containing the plugin object, IE prompts for permission to allow the plugin to run. Even though I allow the plugin to run, it does not get loaded in the page and fails silently.

I did see a similar question posted here - Firebreath plugin not loading in IE 10 - and I have already tried the steps mentioned in this post, but unfortunately it didn't help.

In addition to above I have tried the following, which also unfortunately did not seem to help..

1. Changed the value of HKCU\Software\Microsoft\Internet Explorer\Main\TabProcGrowth registry entry to 1, 5 - for the 32-bit plugin
2. Built and deployed a 64-bit version of the plugin
3. Used Microsoft Internet explorer compatibility test tool to check if the plugin is being loaded for both 32-bit and 64-bit versions. The plugin failed to load for both 32-bit and 64-bit versions
4. I also changed the security settings for IE to have the least security

I am confident that there is no bug in the plugin code, because the plugin works on a bunch of machines, including mine. However when I deploy the plugin on a customer machine it DOES NOT work.

Update 1: I used depends.exe to verify that there are no missing dependencies on the machine on which the plugin is not working. I did not find any missing dependencies. See attached screenshots for 32-bit and 64-bit versions. Also, when I use Microsoft Internet explorer compatibility test tool It clearly says that the plugin is being blocked.

32-bit Dependency Check:

64-bit Dependency Check:

Answer 1

If the plugin works on your systems but not on a customer system then I'd say 90% probability that it depends on some library that isn't installed on the customer system; for example it might depend on a runtime or other DLL that it can't find on the system but is installed as part of your dev tools, thus it works for you and not for them.

use depends.exe on a machine where it doesn't work to trace missing dependencies.