User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0

Steps to reproduce:

Auto-updated Firefox to the latest version 82.0.2

Actual results:

After updating Firefox I noticed two new (default) search engines appeared in my search bar: Amazon and eBay. I had previously deleted/removed these default engines (and all other default engines) and replaced all of them with custom search engines. None of the custom engines had identical names to the default engines.

I proceeded to remove the two "new" engines (eBay and Amazon) and restart Firefox.

However the Amazon engine will NOT be removed. It re-appears after I restart the browser.

I decompressed search.json.mozlz4 and notice that it DOES say "hidden: true" against the Amazon entry so I have no idea why this is happening.

Expected results:

My search engines should have been left well alone!

We have had quite a few reports of the same issue, thanks for the information. duping to 1675624