AdminLTE comes with the same browser support as Bootstrap 4.
Excerpt from Bootstrap’s official Documentation!
Bootstrap supports the latest, stable releases of all major browsers and platforms. On Windows, we support Internet Explorer 10-11 / Microsoft Edge.
For more details look here.
You can find our supported range of browsers and their versions in our .browserslistrc file:
# https://github.com/browserslist/browserslist#readme >= 0.2% last 2 major versions not dead Firefox ESR Edge >= 16 Explorer >= 10 iOS >= 9 Safari >= 9