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por Wlodek el Jul. 16, 2016 · enlace permanente

This extension cannot be installed on my Windows 10 Pro 64-bit for Firefox 47.0.1. The installer says "installed", but actually it is not. After restarting FF, this extension is offered for installation again and again. Cleaning (with CCleaner & Privazer) of the PC and restarting it does not change anything. I must state: this extension cannot be installed on my PC (even in FF Safe Mode), but the reason is unknown, therefore the problem cannot be solved. Any suggestions?