Hi bk_accounts, I don't think there is a preference NOT to show title text in a tooltip. This preference --

browser.chrome.toolbar_tips

-- is for the user interface area ("chrome") and not for web pages ("content").

Perhaps you could find an add-on or userscript that would rummage through selected pages (or pages from selected sites) removing the title attributes from images and links and buttons (or whatever you like).

Well this is somewhat a problem because when I have multiple tabs open this hovertext will sometimes be displayed when I have a different tab open.

E.g., let's say I have an image with hovertext open in tab 1, sometimes when I am in tab 2 the hovertext will be displayed and will only disappear if I go back to tab 1 and move the mouse.

It's really weird because sometimes I don't know why the hovertext is displayed from tab 1, sometimes it will just randomly appear even though I am in tab 2.

bk_accounts said

Well this is somewhat a problem because when I have multiple tabs open this hovertext will sometimes be displayed when I have a different tab open.

Oh, THAT! Yes, it's a bug in Firefox 68.

The tooltips linger when you change tabs or windows before they fade out bug was tracked down and squashed (#1550637). However, the initial fix needed to be fixed, so it didn't get into the most recent update (68.0.2). The fix will be in Firefox 69.0, due out September 3rd.

If you can't wait:

You could consider using Firefox 69 in its pre-release form as the "beta" or "developer" edition of Firefox. You can read more about them here: https://www.mozilla.org/firefox/channel/desktop/

Please make a backup of your profiles before changing "channels": Back up and restore information in Firefox profiles.

Thanks jscher2000, I also found another temporary fix to last me until then. Funny enough, you actually responded on this support question too.

https://support.mozilla.org/de/questions/1192749

Hi bk_accounts, you actually can simplify that rule to:

tooltip {
  visibility: collapse !important;
}