Can you give me the version of the module that you’re using? (Not the Ignition version, because the module doesn’t automatically update when you upgrade Ignition) Then I can try to recreate your issues.
FWIW, we’ve upgraded the underlying libraries for the browser component quite a few times lately. Trying version 1.7.3 (or even the 1.7.4 beta) might resolve many of these problems. You can upgrade the module without upgrading Ignition, so it should be easy to try out.
[edit]
I was able to recreate the Custom Property issue in the latest version, so I’ve filed a bug ticket for that. I’ll also file a ticket requesting the enabled/disabled feature.