It is best to use a compressed image type like PNG or JPG to save the screenshot and make sure that you do not exceed a maximum file size of 1 MB.

Then use the Browse .... button below the Post a Reply text box to upload the screenshot.

Please post a screenshot of that script error message. https://support.mozilla.org/en-US/kb/how-do-i-create-screenshot-my-problem It is best to use a compressed image type like PNG or JPG to save the screenshot and make sure that you do not exceed a maximum file size of 1 MB. Then use the '''Browse ....''' button below the '''''Post a Reply''''' text box to upload the screenshot.

Owner started another thread with the screenshot over here: https://support.mozilla.org/en-US/questions/1043760 ''locking this thread''