Dealing with an Adobe Acrobat PDF file that you have to edit, sign and return can still be a pain, even on modern browsers. Mozilla’s Firefox 106 release, however, says it solved the problem, with editable PDF files that you can sign as well. The latest version of Firefox, which can be downloaded here. This version allows you to add text and signatures, draw on it, and check boxes. All you need to do is open a PDF file in the new Firefox and use the markup options in the upper right-hand corner to make any necessary adjustments. You can either fill out existing fields or add a text box for add…