Version: 54.0.2840.90 (Official Build) (64-bit)
OS: Linux/Ubuntu 14.04

What steps will reproduce the problem?
(1) Go to <https://www.nationalcar.com>
(2) Sign in
(3) Try to make a "one click reservation"

What is the expected result?

After clicking the green reservation button the reservation flow continues with content summarizing the booking.

What happens instead?

Nothing happens.

Note this appears on the console:

2satelliteLib-64715503a5c3f03a9c38350e5a8825412fb1d39a.js:10 A Parser-blocking, cross-origin script, https://assets.adobedtm.com/637ae9c62c9fe0a9a2fd27b1350da0b838190621/mbox-contents-acd0be0245ac9c3b7e8a94d4d4491c612f0bcb5f.js, is invoked via document.write. This may be blocked by the browser if the device has poor network connectivity.loadScriptSync @ satelliteLib-64715503a5c3f03a9c38350e5a8825412fb1d39a.js:10
satelliteLib-64715503a5c3f03a9c38350e5a8825412fb1d39a.js:10 A Parser-blocking, cross-origin script, https://assets.adobedtm.com/637ae9c62c9fe0a9a2fd27b1350da0b838190621/scripts/satellite-5759db0c64746d1e2f00fe62.js, is invoked via document.write. This may be blocked by the browser if the device has poor network connectivity.loadScriptSync @ satelliteLib-64715503a5c3f03a9c38350e5a8825412fb1d39a.js:10
satelliteLib-64715503a5c3f03a9c38350e5a8825412fb1d39a.js:10 A Parser-blocking, cross-origin script, https://assets.adobedtm.com/.../scripts/satellite-....js, is invoked via document.write. This may be blocked by the browser if the device has poor network connectivity.loadScriptSync @ satelliteLib-....js:10
satelliteLib-....js:10 A Parser-blocking, cross-origin script, https://assets.adobedtm.com/.../scripts/satellite-....js, is invoked via document.write. This may be blocked by the browser if the device has poor network connectivity.loadScriptSync @ satelliteLib-....js:10
jquery.min.js:2231 Synchronous XMLHttpRequest on the main thread is deprecated because of its detrimental effects to the end user's experience. For more help, check https://xhr.spec.whatwg.org/.

Note, this works in Firefox 49.0.2