regression range: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=b54d15de5072cd0e289d9a5331dd20d65773a8fb&tochange=6f4c845bf6aa3685427473dffe7e90503f80c03d Before that range, the devtools UI shown in my screenshot consistently uses UTC (there's no Pacific Daylight Time shown). --> Regression from bug 1709867.
Bug 1826998 Comment 5 Edit History
Note: The actual edited comment in the bug view page will always show the original commenter’s name and original timestamp.
regression range: https://hg.mozilla.org/integration/autoland/pushloghtml?fromchange=b54d15de5072cd0e289d9a5331dd20d65773a8fb&tochange=6f4c845bf6aa3685427473dffe7e90503f80c03d Before that range, the devtools UI from my comment 3 screenshot consistently uses UTC (there's no Pacific Daylight Time shown). --> Regression from bug 1709867.