Viewer:  https://mozilla.github.io/pdf.js/web/viewer.html
Chrome on Windows 10
When the attached PDF file is viewed, some of the fonts display as garbled text. 
[Arial, Courier, Times New Roman]
The file views correctly in Adobe Reader.
[fff.pdf](https://github.com/mozilla/pdf.js/files/4652174/fff.pdf)

if (content.length > 1) {
        
        let newLength = 0;
        let j, jj;
        for (j = 0, jj = content.length; j < jj; j++) {
          newLength += content[j].length;
        }
        newLength = (newLength + 3) & ~3;
        const result = new Uint8Array(newLength);
        let pos = 0;
        for (j = 0, jj = content.length; j < jj; j++) {
          result.set(content[j], pos);
          pos += content[j].length;
        }
        table.data = result;
        table.length = newLength;
      }
    }
    function sanitizeTTPrograms(fpgm, prep, cvt, maxFunctionDefs) {