I realize the OP has marked this issue as “solved,” but I noticed, upon returning to this forum looking for new info as to why I can no longer view models with the WebGL viewer in the 3DWH, the OP was experiencing the same issue as I am still experiencing - Error The specified model could not be loaded.
@Barry - I went to WebGL Caps Viewer - WebGL extensions and capabilities viewer | Geeks3D as you had the OP do, and as with other pages that test whether one’s browser supports WebGL, the graphic worked perfectly fine. The diagnostic returned was exactly the same as the OP’s with one difference: the diagnostic is one line short. The variation comes in at line 7 where the OP’s diagnostic shows, “7 - EXT_disjoint_timer_query.” My diagnostic does not have this info, and instead for line 7, picks up where line 8 on the OPs diagnstic continues. Dunno if this will explain anything or not, or help anyone in determining why I STILL cannot view models in the 3D viewer. This diagnostic was done in Firefox 50.1.0/32-bit, I did not run it in FF51.0.1/64-bit.
Of course the reason I am now on this thread - I STILL cannot load ANY model in the WebGL viewer in the 3DWH. I was using Firefox 44.x.x when this all started in September 2016. I have upgraded several times hoping that upgrades will solve the problem, and am now on Firefox 50.1.0 - which I am now sorry that I have, and I am continually getting prompts to upgrade yet again which to this point, I have refused to do. But after someone in this thread asked why the OP was using a 32-bit browser on a 64-bit machine, I decided to look into that. I too was running a 32-bit version of FF.
As mentioned before, I have a Windows 7 laptop. Chrome does NOT play well on this computer. IE, as everyone knows (unless something has changed in the past few months) is WORTHLESS in the 3DWH.
So now…I’ve downloaded and installed FF Nightly again - now v54, and this time, 64-bit. That was a big disappointment, as on the 3DWH index page, if I try to scroll thru the feature categories, any featured model that was off-screen before scrolling comes up a blank box. I clicked one to see what it was. The page containing the model loaded just fine and displayed the model. But when I clicked on the “view in the WebGL 3D viewer,” I ended up staring at a crash report - which I promptly submitted. So much for FFNv54/64-bit. Uninstalled.
After a reboot, I installed FF51.0.1/64-bit, despite the fact that I did not want yet another newer version of FF, AND the 64-bit comes with reduced plug-ins capabilities. I suspect that might have been the issue with Firefox Nightly above. Turns out, I experienced the same thing with this version of FF as I did with FFNightly - if I try to scroll thru the feature categories in the 3DWH index page, any box that was off-screen before scrolling comes up blank. I clicked one to see what it was. The page containing the model loaded just fine and displayed the model. But when I clicked on the “view in the WebGL 3D viewer,” I ended up staring at yet another crash report - which I promptly submitted. Then uninstalled this version of FF also.
Also, @Barry, yes, I did try to load some “models with different memory allotments,” none of which worked as I indicated in my email reply. As for submitting crash reports, I’m going to assume that they are automatic whether the process notifies me of one being generated or not. It was very rare that I was ever presented with one, and in fact had never seen one until well into discussion on this issue in the thread New 3D Warehouse model viewer is broken! Tonite, while I was presented with a crash report in FFN54 and FF51, I was not presented with one when I tried to view models in the WebGL viewer in FF50 before and after downloading, installing and trying in FFN54 and FF51.