[Version]: 61.0a1 [Build ID]: 20180410100115 Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:61.0) Gecko/20100101 Firefox/61.0 [Prerequisites]: * Have the latest Nightly installed. * Accessibility is enabled and accessibility tab is opened in the web console menu. [Steps]: 1. Right click on an element of the page 2. Check the context menu [Expected result]: "Inspect Accessibility" option should be the last option in the context menu. [Actual result]: "Inspect Accessibility" option is missing even if the Accessibility is enabled and accessibility tab is opened. [Note]: On the previous [Build ID]: 20180327120140 the issue was not present.

This is coming to a Nightly near you any minute. bug 1428441, which implemented this, was merged last night.