There are many reasons for the loss of favorites. The most common ones are the following: 1. Mistake: You may have mistakenly added a favorite website to the "deleted" or "changed" list while browsing the web, or moved the favorites to another place, causing the favorites to be lost. 2. Corrupted files: If you accidentally delete the files in the Favorites folder or the computer has an unexpected restart or renamed, the Favorites folder may not be found. Internet connection problems: If your network connection is unstable or your network connection device (such as a router1) is faulty, you may not be able to access the Internet and your Favorites may not be found. 4. Browser settings: You may have changed the settings of your browser, causing your favorites to not be automatically saved or displayed. If you find that you have lost your favorites, you can try the following methods to recover them: 1. Re-create Favorites: If the Favorites are lost due to a mistake, you can try to re-create a new Favorites. 2. Favorites scanning: Use some online scanning tools such as Favorites scanner or scan Favorites manually. 3 Use a search engine: Use a search engine to search for the name of your favorites and try to find the website you saved previously. 4. Check the network connection: Check if the network connection is stable and try to connect the network connection device again. 5. Upgrade your browser: Make sure your browser version is updated to the latest version to fix possible bugs and problems.