Various anomalies in rendering persist throughout the UI when using Firefox. As an example (but not the only one) pasting a large script into the Mini-IDE causes indents in the lines to double each line, rendering the script unreadable. To reproduce, use Firefox, then: Create a new script Open the Mini-IDE to edit the script Paste in a well-formatted script (eg: https://raw.githubusercontent.com/cesmii/SMIPScripts/main/Brewing/PlaatoProType.php ) Observe that indents grow and the script becomes unreadable Please see Jonathan Wise for a rant on why Chromium-based browsers are evil, and why its critical that alternative web rendering engines be support to maintain an open web.