All keyboard shortcuts are fully configurable. So it would be possible to prevent collisions with other extensions. Open the options dialog to configure the shortcuts, click the button "Shortcuts" and change them to your needs.
Tip: The extension keyconfig allows you to configure all shortcuts in Firefox.
Following list shows you the default shortcut settings for english and german language. Please note that they can vary depending upon language (the translators of this extension specifies the default settings). The actually settings can be seen in the options dialog, if you click the button"Shortcuts".