Hello
Please tell me what is the cause CPOW error and How to fix this.
I use Firefox Developer Edition 54.0a2 to test my addin.
4 month ago, my addin run without any problems.
But now, many errors “unsafe/forbidden CPOW usage” occur.
It’s likely your add-on is broken by multiprocess compatibility. If you haven’t already, please look into the new WebExtensions API, which shouldn’t have these problems.