Install Firefox 55.0.3

CSIT tests fail on the latest version of Firefox.
Looks like this is caused due to new dependency libraries.
Downgrade to 55.0.3.

Change-Id: I52d6b67472131e48ebcae52ab5e7825dad9be991
Issue-ID: CIMAN-33
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
1 file changed