Block Other Extension's Connections

[DefensiveDepth]

Is it possible to block outgoing connections that other Extensions/Plugins are making?

For instance, when the browser is started, the MySmartPrice extension makes a connection to extensions.mysmartprice.com and downloads a bunch of initial data. I have not been successful in blocking this type of initial connection with Adblock Plus.

Is this even possible?

Thanks

[mapx]

Even if ABP could read the calls from other extension, on the browser start even the ads on the normal pages aren't always blocked (the pages are loaded before ABP is initialized).

[DefensiveDepth]

How about Post-Startup calls from other extensions?

[mapx]

You could block
extensions.mysmartprice.com
using the hosts file but ... what if the extension needs that server for a correct running ?

[DefensiveDepth]

Yes, I have considered the hosts file....

Thanks for your quick responses!