WebPG failed to load

[fragosgeorge]

I'm getting this message on Firefox 56.0

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Error loading WebPG

We encountered a problem while attempting to load WebPG

Error (-1): WebPG Plugin failed to load
Suggestions:

The plugin was unable to load

Error Details
Error in Method: undefined
Error Code: -1
Error String: WebPG Plugin failed to load
File: webpgPluginAPI.cpp
Line: -1
System Information
Platform: Linux x86_64
App Version: 5.0 (X11)
User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:56.0) Gecko/20100101 Firefox/56.0
Product: Gecko
Sub-product: 20100101
Vendor:
Language: en-US

[cronopio]

Its probably that due mayor changes on Extensions API this extension is not compatible with new versions of Firefox.