Manual copying of contents on firefox introduces newlines

Using firefox on windows 10, manually copying text includes many newline characters causing code to be ruined when pasting. This renders some code in the wild totally unusable. I understand there is a copy (clipboard) button but it's common for people like myself to copy a few lines at a time to test things out. Example code where this was tested: https://twoslash.netlify.app/guide/#after Expected output (when copied with clipboard) ``` // Declare a tuple type let x: [string, number] // Initialize it x = ['hello', 10] // Initialize it incorrectly x = [10, 'hello'] ``` Current bad output (when copied with manual selection, ctrl+c): ``` // Declare a tuple type let x : [string, number] // Initialize it x = ['hello', 10] // Initialize it incorrectly x = [10, 'hello'] ```