Hi Niki-, I am sorry to hear you are having issues with your web browser freezing. Besides the recommendations from the prior thread, you may want to try starting Firefox in [[Troubleshoot Firefox issues using Safe Mode|Safe Mode]] as there may be an extension causing issues with your web browser. Starting in Safe Mode will disable all add-ons for troubleshooting. You could try running anti-virus software linked below: [https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware#w_how-do-i-get-rid-of-malware_2 How do I get rid of malware?] Have you followed up with any of the recommendations from your prior thread? https://support.mozilla.org/en-US/questions/1269684 Let me know if I could further assist.

How are you opening this Word Doc? Firefox doesn't support this file format natively, so you would have to select a suitable application (NOT Firefox) when you get an 'Open with' or a 'Save File' dialog.