Firefox ver.23 no longer shows answers.com as an available search engine.
Downloaded ver 23. Health Report suggested a reset. Now Firefox SearchBox no longer shows answers.com as an available option and Manage Search Engines does not list answers.com. I did redownload answers.com and it appears as enabled in the extension add on list.
Re: Firefox ver.23 no longer shows answers.com as an available search engine.
When you reinstalled the extension, it might not have included the search plugin that adds a new service to the search box. Have you exited and restarted Firefox to see whether it shows up after a second restart?
If you cannot get it from another source, the plugin might still be saved in the "Old Firefox Data" folder that the Reset feature should have deposited in your desktop.
If you open that folder and then double-click into the searchplugins folder, can you see a file that looks like it would search answers.com? If so, you could try copying and pasting it into you current "live" searchplugins folder, then restart Firefox to see whether it is detected.
From within Firefox,
Help > Troubleshooting Information > "Show Folder" button
This should open your current Firefox settings (Firefox Profile) folder.
Keeping that folder open, switch back to Firefox and Exit
Pause while Firefox finishes its cleanup.
Is there a searchplugins folder? If so, double-click into that folder, then copy and paste the missing file from your old folder to your new one.
If there isn't a searchplugins folder, you could create one, or you could copy your entire old searchplugins folder to your new profile folder.
When you restart Firefox, did it detect and add the missing search engine?