Show the issue and provide steps to replicate.

Not sure what you want. For example, when I type any of the following examples: NYTimes.com; www.NYTimes.com; https://nytimes.com; the url I now get is: feed://nytimes.com

In other words, Firefox adds the word feed: before the url I am trying to reach, which generates a completely different website.

Not sure how to stop this or block this.

Do you only get this for this specific website?

Do you see any feed related actions in "Settings -> General -> Applications" ?

• https://support.mozilla.org/en-US/kb/change-firefox-behavior-when-open-file

You can remove all data stored in Firefox for a specific domain via "Forget About This Site" in the right-click context menu of an history entry ("History -> Show All History" or "View -> Sidebar -> History").

Using "Forget About This Site" will remove all data stored in Firefox for this domain like history and cookies and passwords and exceptions and cache, so be careful. If you have a password or other data for that domain that you do not want to lose, make sure to backup this data or make a note.

You can't recover from this 'forget' unless you have a backup of involved files.

If you revisit a 'forgotten' website, data for that website will be saved once again.

• https://support.mozilla.org/en-US/kb/delete-browsing-search-download-history-firefox