Hi, strange, please try this : uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files , C:\Program Files(x86) & C:\ProgramData Then restart system. Then run Windows Disk Cleanup. (Note: This should be Pinned and run Weekly, If never done below expect 10's of gig's) Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do :

• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles
• https://support.mozilla.org/en-US/kb/export-firefox-bookmarks-to-backup-or-transfer

Reinstall with Current Release Firefox 60.0.0 with a Full Version Installer

• https://www.mozilla.org/firefox/all/

Please uninstall your Flash 27.0 r0 as is a security risk Flash Player Version: 29.0.0.171 Current Version https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, . . . .) Note: Other software is offered in the download. <Windows Only>

Please let us know if this solved your issue or if need further assistance.

Note that these buttons may not be visible when the Firefox window isn't high enough. You can try Full Screen mode (F11) or zoom out the page (Ctrl + -) to see if that makes the buttons appear.

I checked, and the problem is not that Firefox is not high enough. I will try the uninstall, etc. next. Thanks.

I was just about to uninstall Firefox when I decided to try that second option again. I don't know why I didn't see it the first time, but going full screen solved the problem. Thanks for your help.