When you tap the back button it double back

A very bad error has been going on for a while now. The browser no longer behaves correctly when using Google Search. For example, you search for "flowers." Then you search for something else, such as "cars." You open one of the car images from the search results. When you tap the back button or the X-button to close the image, Firefox jumps back to the previous search ("flowers") instead of returning to the car image results. It should return to the car results, not the earlier search!