Before, the "find bar" was the same all tabs. But now I write a word (e.g., "hello") in the bar, I go to another tab and I open the bar, after the word appears ("hello") and I change it (e.g., "goodbye"), and I come back to the previous page, it continues to be the same word ("hello").

I want to be able to configure Firefox that when I modify the "find bar" in a page, it modifies in all pages (somewhat like the way Internet Explorer works). How can I do that?