The support forum is for providing solutions or workarounds. If you want to submit comments or suggestions, open the Help menu and choose Submit Feedback. That points to

• https://input.mozilla.org

You should have a Back button on the left side of the address bar. If it's missing, right-click an empty area of the tab bar and choose Customize. Click the Restore Defaults button near the bottom.

The Forward button is only visible when there's a page to go forward to.

Can you attach a screenshot?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Use a compressed image type like PNG or JPG to save the screenshot.

You can check for problems caused by a corrupted localstore.rdf file.

• http://kb.mozillazine.org/Corrupt_localstore.rdf