When editing text in Netscape 4.79, a huge percentage of the standard Emacs text-editing bindings are available. Alas, most of these bindings are missing completely or do the wrong thing in Mozilla. This is simply a terrible change in UI. I should be able to hit Meta-Backspace to delete a word backward. I should be able to hit Meta-b to move backward. I should be able to hit Meta-f to move forward a word. Etc. If there was a binding for it in text-editing areas in Netscape 4.79, there should be a binding for it in Mozilla. I consider this a *serious* regression in functionality, one that's threatening to force me back to Netscape 4.79 even though there are numerous Web sites which Netscape 4.79 can't view properly.
If this gets fixed upstream I'll take the fixes, but I'm probably not going to take the time to fix them here. (you can use ctrl-right arrow and ctrl-left arrow to move forward and backwards a word at a time.)