Hi, Please try a '''Ctrl''' + '''F5''' refresh. You may also have to '''Clear Now''' the '''Cache''', '''Site Preferences''' , and '''Cookies''' with '''Time range to clear''' set to '''Everything''' via '''Tools''' ('''Alt''' + '''T''') > [https://support.mozilla.org/en-US/kb/Clear%20Recent%20History Clear Recent History]. Please note that as the file is permanently saved in your PC, and if the picture/content location changes, or is deleted on the site then you may not be able to access it. You can also reset Firefox and check though this would not help if the location has been changed/deleted. The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information. Note: ''This will cause you to lose any Extensions, Open websites, and some Preferences.'' To Reset Firefox do the following: #Go to Firefox > Help > Troubleshooting Information. #Click the "Reset Firefox" button. #Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish. #Firefox will open with all factory defaults applied. Further information can be found in the [[Reset Firefox – easily fix most problems]] article. Did this fix your problems? Please report back to us! If you would like to take a listing of the add-ons, changed preferences/settings etc. to quickly replicate the previous profile, please '''Copy all to clipboard''' (on the left of the reset button), and paste it into MS Office Excel, or OpenOffice/LibreOffice Calc, or notepad. However, it would be a good idea to check for the existence of the issue immediately after the reset. If you are able to view all the pictures again, it would also be a good idea to re-save the site as MHT or MAFF using either [https://addons.mozilla.org/en-US/firefox/addon/unmht/?src=search UnMHT] or [https://addons.mozilla.org/en-US/firefox/addon/mozilla-archive-format/?src=search Mozilla Archive Format]. Additionally you may also want to save another copy after choosing '''Work Offline''' via '''File''' ('''Alt''' + '''F''') and you can later check both the saved files when not connected to the internet and keep one that is complete.