I suggest trying the options in Print Preview. There you can adjust the shrink-to-fit setting, if you can tolerate smaller type, or if there are frames in the page, you can choose to print the selected frame (make sure to click the frame you want to print before starting Print Preview).

Also, if there are parts of the page that are really not logical to print, look for a print view icon to get a better formatted page.

Does that help?

Thanks for your response. The shrink to fit setting definitely results in print too small for even my trifocals. I have tried to navigate the frame selection process, but though the option is listed on the drop down menu, it is not highlighted, so i do not have the choice active. I am not sure that all pages have recognized "frame" sections?

The "print view" or "print friendly" view or "view as web page" will work when that option is embedded in the email or page, but is not always available.

Again, the thing that seems to cause the printing to cut off is the "column(s)" that appear to the left of the page. This is the section that contains the folders in the email page or is a navigational bar in web pages. Still at a loss here. Have been using Firefox for some time now and did not always have this problem.

You're right: most web pages do not use frames, so that option usually is not available.

I don't know why a page that printed just the main content before would change to printing with useless sidebars. Can you try the site in Firefox's Safe Mode and see whether it prints/previews correctly there?

First, I recommend backing up your Firefox settings in case something goes wrong. See Backing up your information. (You can copy your entire Firefox profile folder somewhere outside of the Mozilla folder.)

Next, try starting Firefox in Firefox Safe Mode. Be careful not to "reset" anything permanently if you didn't back up.

Does that fix it? If so, the difference usually is caused by one of your add-ons. You can restart the regular way and disable all non-essential add-ons here:

orange Firefox button or Tools menu > Add-ons

In particular, check the Extensions category.

Firefox > Print > Page Setup -> Margins/Headers&Footers
or
File > Page Setup -> Margins/Headers&Footers
What are the left and right margins set to?

Have you tried setting smaller margins??

As far as "email" in Firefox, which webmail portal or service are you using?
Maybe another user of that same service can advise you about how to print a message without getting the "navigation menu" on the left side of the sheet of paper.