The problem
ColorZilla is a tool for web developers and graphic designers who want to sample the color from any point in the browser. Unfortunately, ColorZilla coredumps on Ubuntu.1
The solution
Visit Firefox download page and download the latest version of Firefox. Extract the firefox/libxpcom*-files from the downloaded .tar.gz-archive. Move the extracted files to /usr/lib/firefox. These steps can be done with following command lines: