Debian :: Google Maps Street View And Iceweasel

I've been a Debian convert for several years now, and generally use the Iceweasel browser (currently 31.7.0) supplied in the Debian repo. I've noticed that since Google Maps added 3-D effects to its Street View interface, and changed things up a bit, that it siezes Iceweasel. You can't "drive" the streets without the screen hanging. I'm running Debian 8 AMD64, and the free Noveau drivers for a Radeon 7570 video chipset. And I duplicated the problem on another PC with an onboard Intel video chipset.

Here's what I attempting in debugging things:

1. Installed the latest Adobe flash (not sure this was necessary).
2. Tried using the non-free ATI drivers, but ran into issues and removed those.
3. Tried tinkering with about:config webgl settings -- but there's a number of those, and I didn't know the minimal number to tweak, so I reverted back to defaults.
4. And unless I'm simply missing something, the "Lite View" option for Google Maps seems to have recently disappeared.

So Google Maps Street View still wasn't working. Then I stumbled across some references to using "force=webgl" as an URL parm in Google Maps: [URL] ....

Out of curiosity then, thinking the issue is not at my end at all, I downloaded the User Agent Switcher for Iceweasel and changed my agent's response to the latest Firefox on Windows 8.1. Reloaded the Google Maps Street View, and bingo -- it works great. Google doesn't like Iceweasel because of that name in the user agent?

This is a klunky method of using Street View, and I have filed an issue with Google (but I give that about as much odds as writing one's congresscritter). Or is there some easier way to use Iceweasel with Google Maps Street View by making more about:config webgl tweaks?