Mozilla implemented a similar strategy as that of Safari, although less deceptive than what Apple sunk to. However the installation process of Firefox 3.0 Release Candidate 1 was tweaked to contain a box already checked which makes it the default browser of the operating system it installs on.
"The option is clearly displayed and labeled, unlike Safari, which misleadingly labeled the Safari install as an 'update' (since correctly changed to an 'install'). However, this practice is a break from the traditional practice browsers employed of defaulting this option to off. Prior to this change, Firefox 3.0 was already rapidly gaining usage share, so it will be difficult to measure the effect of this change", Net Applications stated.