www.pearsonmylabandmastering.com - site is not usable

[webcompat-bot]

URL: https://www.pearsonmylabandmastering.com/northamerica/mymathlab/

Browser / Version: Firefox 57.0
Operating System: Windows 10
Tested Another Browser: Yes

Problem type: Site is not usable
Description: all most all functions of this site does not work
Steps to Reproduce:
when i click sign in nothing happens but it works on chrome

From webcompat.com with ❤️

[karlcow]

There is an event set on the anchor sign-in button.

<a onclick="return showCompatibilityMsg('https://portal.mypearson.com/portal')" 
  href="https://portal.mypearson.com/portal" 
  class="button button-big-icon bg-color-match-medium">
    <span class="left" aria-hidden="true" data-icon="">
    </span>Sign in
</a>

function onclick(event) {
  return showCompatibilityMsg('https://portal.mypearson.com/portal')
}

which calls

//Set the system requirement URL explicitly if required.

    browserChecker.systemsRequirementURL = "https://www.pearsonmylabandmastering.com/northamerica/mymathlab/system-requirements/";

    //Pass the product name as parameter, for testing purpose we have only "maths" and "physics"

    //and consider particular product's OS and browser matrix, if you don't pass the product name it will consider global matrix.
    browserChecker.init('');

    // Call this method on click of sign-in and student registration button and pass the target URL as parameter
    function showCompatibilityMsg(link) {
        try {
            browserChecker.displayCompatibilityMessage(link);
            return false;
        } catch (e) {
            window.location.href = link;
            return;
        }
    }

When clicking the sign in button it says:

The funny thing is that the support page says that Firefox is supported.

[karlcow]

The code is in https://e2e-comms.pearson.com/osbrowserchecker/prd/checker-module.min.js

oh and btw I have the feeling this is happening with all browsers for me because of OS X 10.3.1 is not part of their matrix.

This is their support matrix .

https://e2e-comms.pearson.com/osbrowserchecker/prd/jsondata/globalmatrix.json

A good example on why user agent sniffing fails.

[adamopenweb]

I've spoken with Pearson support in the past regarding #15032.

They suggest if users have issues to contact them directly through:
https://support.pearson.com/getsupport/s/contactsupport

As for the Sign In button it works for me in FF 59+ for OSX.