When you type the word “firefox” into your browser, what do you see? If you see an index page with a number of links, that’s because Firefox is indexing them all – and it’s doing so every time you open your browser. The index is used to find the URLs of the pages you want and avoid loading pages that don’t belong there. Having a well-defined index can be helpful for your website, but remember that it’s not perfect:

The index will miss URLs entered in search engines, and it won’t work if some other software places those same pages on your site. One way to fix this is to delete any unwanted URLs from the Web folder on your computer or server.