When I go to menu -> Tools -> Add-ons, I can see tho following page instead of addons managing interface: XML Parsing Error: undefined entity Location: about:addons Line Number 359, Column 15: <button class="button-plugin-disable" If I move avay the directory ~/.mozilla/torbrowser then in the new profile I can open about:addons with no problems. But I need to fix my current profile. **Trac**: **Username**: tot-to