Update: I got rid of PaleMoon and installed IceDragon. It certainly looks nice, but runs VERY slowly, and I'm now having the same problem with it as I did with PaleMoon: alt-text and title-text for images does NOT display in a tooltip. Also, exactly as Palemoon, several parts of the program don't show up right. If I click the Ghostery button, the menu bubble pops up and briefly displays the information, then in a fraction of a second the information disappears and the bubble turns white. If I click the logo in the upper-left to open the program menu, it flashes then disappears. Tooltips do not display anywhere. Something is wrong here.
I don't understand. It works fine on Firefox. Can anyone help out here? Or should I take this question to the computer help thread?
Edit: Hm... Another issue. The menu bar at the top is way too big, and the very top of it isn't even usable. By that I mean that in Firefox (or Chrome), the tabs are clickable even if I move the mouse pointer all the way to the top of the screen. In IceDragon, the clickable part of the tabs seems to be the same size, but they've added an extra 5 pixels or so at the top which is not clickable. It's just there for no reason, taking up space on my small laptop screen. I've changed the menu options to use small buttons, but it's still too big. Is there any way to change that? I'm looking but I can't find one.
I might be stuck with Firefox after all. It may have problems, but at least the interface is well-designed and my tooltips work... It crashes sometimes, but until it crashes it actually WORKS the way I want it to. It seems these other browsers completely mess up all the things I *like* about Firefox. Isn't there one that just fixes security issues and crashes without screwing up the interface?
Edit2: Okay, it turns out the "hardware acceleration" was what was messing up the tooltips. So that's fixed. And I found an extension that shrinks up the interfact a lot, so it doesn't take up so much space. I still can't get rid of the few useless pixels at the top of the tabs that can't be clicked, but now it's only about 2 pixels, so at least it's an improvement. I'll give this a week and see how it feels.