At the end of last week, mochitest-browser-chrome was split out from mochitest-other (bug 791389), roughly halving the time taken for mochitest-other to complete.
Trychooser  has been updated, but if you either type from memory or use saved MQs, please use 'mochitest-bc' if mochitest-browser-chrome is needed, since 'mochitest-o' will no longer cause it to be run.
For those interested in the benefits of splitting it out, see:
With b-c removed, the remaining mochitest-other suites are:
* mochitest-a11y (not run on all platforms)