User Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/70.0.3538.77 Chrome/70.0.3538.77 Safari/537.36 Steps to reproduce: I was testing the firefox's marionette codes , my work was to shorten the html codes required . So i tried to analyze the web pages in the these links https://dxr.mozilla.org/mozilla-central/rev/default/testing/marionette/harness/marionette_harness/www/cssTransform.html https://dxr.mozilla.org/mozilla-central/rev/default/testing/marionette/harness/marionette_harness/www/cssTransform2.html This can be present in other code's as well Actual results: I found that the css transform property parameters aren't standardized At one place : https://dxr.mozilla.org/mozilla-central/rev/default/testing/marionette/harness/marionette_harness/www/cssTransform.html you can see in the css transform property display width is shown in "px" While at this next html code : https://dxr.mozilla.org/mozilla-central/rev/default/testing/marionette/harness/marionette_harness/www/cssTransform2.html It is shown in "%" at some places . Expected results: As these codes are written by vendor or any person . The codes parameters should have used the same "unit" for specifying the css transform properties . As far as the guidelines of writting html code ,there must only be a single unit to write/define a particular css field . We use "px" in https://dxr.mozilla.org/mozilla-central/rev/default/testing/marionette/harness/marionette_harness/www/cssTransform2.html so that it remains consistent with device width/height , that are defined already defined and change the "%" field to its "px" equivalent . We stick to only one unit system to avoid any broken tests

We are getting rid of this file on bug 1441437, so I don't see any need to fix it first.