The new Firefox is not compatible with many add-ons.

Here are your choices; 1) Contact its support and ask if they will update 2) Find a replacement 3) Downgrade to a prior Firefox 4) Do without

Yahoo toolbar is likely a Legacy extension that won't work in Firefox 57+

Did you lose bookmarks and possibly other personal data when updating?

This shouldn't happen normally, but appears to happen for some.

In such a case check in the Library if there are bookmark backups available.

• Bookmarks -> Show All Bookmarks -> Import & Backup -> Restore

You can check if you have an "Old Firefox Data" folder on the desktop in case the Refresh feature in Firefox has been used and a new profile has been created.

• https://support.mozilla.org/en-US/kb/reset-firefox-easily-fix-most-problems

See also:

• https://support.mozilla.org/en-US/kb/Lost+Bookmarks

All hail cor-el! (Son of Jor-El?) Thanks for the prompt reply and helpful information. Gary Ware

fyi if updating :

• 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

https://addons.mozilla.org/en-US/firefox/extensions/ https://www.howtogeek.com/333805/how-to-change-or-customize-firefoxs-new-tab-page/ https://www.howtogeek.com/333110/how-to-customize-firefox-quantum-and-remove-the-white-space-around-the-title-bar/ https://www.howtogeek.com/334716/how-to-customize-firefoxs-user-interface-with-userchrome.css/ and should be at 57.0.4 for this : https://www.theinquirer.net/inquirer/news/3023893/opera-mozilla-vivaldi-and-more-rush-to-patch-spectre-and-meltdown-security-holes

Dear Mr/Ms Shadow...Thanks for the prompt and helpful response. I'm saving your roadmap in case I need it...even though it's "Greek" to me! (This is in no way a racial epithet; My great ancestor, Julius Caeser used to say this all the time!)

LOL Yes it is a road map. I thought you would be more comfortable knowing the road ahead.