1. go to about:config and flip general.useragent.compatMode.firefox to true. (Otherwise MapsGL doesn't work)
2. go to maps.google.com.  At the bottom left, an "Experience MapsGL" window should appear. Pop it open,
and enable it.
2b. if that doesn't work, I suppose you can go to http://maps.google.ch/?vector=1 directly.

This segfaults conkeror with the following messages printed to the terminal:
<pre>
Console error: [JavaScript Warning: "reference to undefined property b.view" {file:
"chrome://global/content/bindings/tree.xml" line: 1034}]
  Category: chrome javascript
Console error: [JavaScript Warning: "reference to undefined property this.treeBoxObject.view" {file:
"chrome://global/content/bindings/tree.xml" line: 0}]
  Category: chrome javascript
Console error: [JavaScript Warning: "reference to undefined property 1" {file:
"chrome://adblockplus-modules/content/FilterClasses.jsm" line: 561}]
  Category: chrome javascript
Segmentation fault
</pre>

Using conkeror 318031ed and xulrunner 10.0.2.