User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0 Build ID: 20180206200532 Steps to reproduce: Opened: Preferences -> Search Removed * Bing * DuckDuckGo * Yahoo Actual results: When I tried to add this I could not install these OpenSearch engines: * https://addons.mozilla.org/en-US/firefox/addon/bing/ > "Firefox could not install the search plugin from “https://addons.mozilla.org/firefox/downloads/file/54407/bing-20090601.xml?src=dp-btn-primary” because an engine with the same name already exists." * https://addons.mozilla.org/en-US/firefox/addon/duckduckgo-ssl/ > Firefox could not install the search plugin from “https://addons.mozilla.org/firefox/downloads/file/240221/duckduckgo_https_ssl-20140120.xml?src=dp-btn-primary” because an engine with the same name already exists. Expected results: The search engines can be restored from Preferences -> Search by clicking the "Restore Default Search Engines" button. Please show delete search engines on that list to make clear that they cannot be installed from addons.mozilla.org.

Thanks for the report, that seems like a pitfall we could do more to help users avoid.

Looking for suggestions or next steps for this?

(In reply to Sam Foster [:sfoster] from comment #1) > Thanks for the report, that seems like a pitfall we could do more to help > users avoid. Thanks.

This seams very related to: https://bugzilla.mozilla.org/show_bug.cgi?id=1433263 I'm forwarding the needinfo to Michelle, as she is also the one looking into the other bug.