breaks after ff updates itself Rated 4 out of 5 stars

i love this addon except this problem

sorry about posting bug here but i found no contact or support info.
last couple times ff updated itself i got this.
this time i can't get rid of it except by disabling addon.

XML Parsing Error: undefined entity
Location: jar:file:///mnt/home/.mozilla/firefox/nunzpnku.default/extensions/sttr@masterada.hu.xpi!/chrome/content/about_sttr.xhtml
Line Number 50, Column 9: <button id="errorCancel" label="&restorepage.cancelButton;"
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update to addon version 1.2 (for firefox 16+)