Rated 5 out of 5 stars

Brilliant Add-On!

However, when trying to open config (Windows 10, Firefox 43.0), it gives the error: XML-Verarbeitungsfehler: Nicht definierte Entität
Adresse: chrome://copy-urls-expert/content/dialogs/options.xul
Zeile Nr. 146, Spalte 3: <prefpane flex="1" id="copyurlsexpert-shortcutkeyspanel" label="&copyurlsexpert.options.shortcutkeystab;" image="chrome://copy-urls-expert/skin/keyboard.png">
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This review is for a previous version of the add-on (2.4.1). 

Thanks for bringing this into my knowledge. A fix is on the way.