Or if it's installed, reinstall it with sudo apt-get -reinstall install firefox. The fix is to Install the firefox package. The program 'firefox' is currently not installed.You might see an error like this when you try to run firefox: If the Command-Line Shell Cannot Find Firefox Either I've listed some examples below of how it might not be working, along with some solutions. In that case, please edit your question to include this information (or, for people other than the author of this question: you can search for your problem and post a new question if you don't find a solution). If that does not work, then the way it doesn't work will provide valuable diagnostic information about the problem.
If that works, then you've solved the main problem (and you can solve the problem of why you cannot run Firefox from the dash at your leisure). If you get something, try running Firefox from the command-line: firefox You can install firefox from the Software Center or by running: sudo apt-get update & sudo apt-get install firefox If you get nothing, or all the entries given by the second command start with something other than ii (like rc), then Firefox is not installed. To be sure, open a Terminal window ( Ctrl+ Alt+ T) and run: which firefox If you search for Firefox and don't find it, that suggests it's not installed.
