BrowserTime

Extension to change from 12 hour to 24 hour format. Text Input fields (like search engine or anywhere else) are not touched

Website will be fixed edited within half of 1 second (500ms)

There might be some JavaScript errors thrown, might not work everywhere, but seems to work not that terribly...

or GitHub
Firefox Extension store -OR- Chrome webstore

And yes from looks of it, extension release works a bit differently from greasyfork despite same exact code... like on this page https://www.mathsisfun.com/time.html ..? (violentmonkey changes am/pm time as well, but browser extension release doesn't touch it, and yes it works because this https://www.onlineconversion.com/date_12-24_hour.htm and other sites confirm it)

Sources

Inspired on work from Greenscreener:

• https://gist.github.com/Greenscreener/4422f5be36752bc720cbc7222fb73cdc