grunt tests” task throws error as Fatal error: spawn EACCES <p>command 'grunt tests'</p> <p>throws following errors:</p> <p>Running tests" task (node:956) DeprecationWarning: process.EventEmitter is deprecated. Use require('events') instead.</p> <p>Running "karma:unit" (karma) task INFO [karma]: Karma v0.12.37 server started at <a href="http://localhost:9876/" rel="nofollow noreferrer">http://localhost:9876/</a> INFO [launcher]: Starting browser Firefox Fatal error: spawn EACCES</p> <p>i have following setup: FIREFOX_BIN=/usr/bin -- where firefox exists</p> <p>and have following grunt tools installed on Centos 6. grunt-cli v1.2.0 grunt v0.4.5</p>