Looks like you're on Mac: https://support.mozilla.org/en-US/kb/text-recognition https://support.mozilla.org/en-US/kb/text-recognition There's also a chance you

Looks like you're on Mac: https://support.mozilla.org/en-US/kb/text-recognition https://support.mozilla.org/en-US/kb/text-recognition There's also a chance your scanner's OCR function was recently enabled by default. The feature is still sitting as "planned for the future" in their PDF library: https://github.com/mozilla/pdf.js/issues/15843 https://github.com/mozilla/pdf.js/issues/15843