Firefox extension messes up website text formatting

The 1Password extension for Firefox seems to mess up the text formatting of some code blocks. One example is to go to https://griff.systems/posts/self-contained-sqlite-database-in-powershell-script/ and look at the code blocks. They display properly when the 1Password extension is disabled, but when it's enabled it removes all of the text formatting from the code blocks, so they display as a single long unformatted string. This does not seem to be an issue with the 1Password Chrome extension; only Firefox.