OneLiner: Save to Pocket - button doesn't work

[ghost]

Newer Firefox versions come with this save-for-later service Pocket (Read It Later, Inc).
When I click the "Save to Pocket" the button turns red and does nothing else.
You can add it to your FF from menu ->customize
It shoud open small popup to add tags and save to pocket. When I disable Oneliner it works like it should. Tested also with other windows machine and it's the same.

Version: Mozilla Labs: Prospector - OneLiner 2.1-signed.1-signed
Mozilla Firefox for ubuntu 1.0 version 48.0