I have been checking my SSS contribution and other online inquiry years since now but lately it has been a hassle.
Based on their website the Social Security Systems of the Philippines ask its users to download Internet Explorer 11 which most of Internet savvy doesn't like or how about the guys who doesn't use Windows based at all?
Back in the days, I used to access SSS online services using firefox.
From this video below you can see how to access SSS services and the services you use to access before using Google Chrome.
Checkout the step-by-step procedures from the video below.