gnome-web-photo causes instability of FireFox

[Jochen]

Ubuntu Mate 16.04.3 LTS
Release: 16.04

gnome-web-photo (0.10.6-1)

After installing gnome-web-photo, Firefox became instable, but only when loading saved HTML files from HD. Loading from internet caused no problem. Loading one or two files (TAB) FF could still manage, but loading more caused hanging of the whole system, CPU overload for even several minutes, sometimes recovering or even complete Linux crash. Sometimes a message appears saying that the script is damaged:

"script: chrome://browser/content/tabbrowser.xml:690"

Updating from "firefox (56.0+build6-0ubuntu0.16.04.2)" to "57.0.1+build2-0ubuntu0.16.04.1" did not change anything. Deinstalling gnome-web-photo solved the problem immediately.