Paths of the form: 'jar:file:///tmp/tmp2DqEYgBuildGetter_firefox/firefox/omni.ja!/components/Webapps.js' are now normalized to: 'jar:file:///.../omni.ja!/components/Webapps.js' when diffing about:memory reports. This is particularly useful when checking for regressions across builds which will often have different install paths.