Acronym tag no longer showing title in Firefox 2.0

What’s up with the acronym tag in Firefox 2.0? It used to show alt text when you hovered over the acronym but as of the 2.0 release it no longer displays anything when you mouse over it. The acronym is still underlined and the mouse cursor changes when you mouse over it, but nothing happens.

I’ve looked around for anyone else seeing this issue and I haven’t seen any mention of it.

Here’s an example: FBI

If it’s working, you should see “Federal Bureau of Investigation” when you mouse over FBI. I’m not seeing it.


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  1. It’s working for me, but I’m just using the unpacked tarball, not the version bundled with my distro. Don’t know if that matters.

    Comment by mckay on November 9, 2006 @ 8:53 am
  2. That’s interesting. I’ve tried on both Windows and Linux and I don’t see it. I even checked in about:config and found a setting called browser.display.force_inline_alttext but that didn’t have any effect.

    Comment by dan on November 9, 2006 @ 10:33 am
  3. Works fine for me in 2.0 on XP Home. I was able to see the alt text both in Bloglines and over here.

    Comment by Meredith on November 9, 2006 @ 4:39 pm
  4. I just tried on my laptop and it showed up. I must have inadvertently changed a configuration option somewhere.

    Comment by dan on November 9, 2006 @ 5:02 pm
  5. Aha! I used the tips at Lifehacker and hadn’t realized that turning off the toolbar tips would turn off all tooltips. I switched the option back to true and the acronym popup is working again.

    So in short, if you’re not seeing acronym or title alt text set this option: to true.

    Comment by dan on November 10, 2006 @ 2:43 pm
  6. Just a big thank you :) I had the exact same problem, just couldn’t put in in proper words. Thanks for the help!

    Comment by kb on December 18, 2006 @ 3:47 pm
  7. Does anyone know how to turn off the automatic underlining that Firefox puts under acronyms. I want the tooltip available, just dont want the underline as it interferes with the rest of the styling on the page. Tried the text-decoration=”none” route within the tag, but to no effect. Any ideas?

    Comment by Alex on January 4, 2007 @ 2:33 am
    Found the solution. It’s actually a bottom border, not a text decoration so selecting style=”border-bottom:none” removes the dotted line.

    Comment by Alex on January 4, 2007 @ 7:43 am
  9. Thanks Dan! This was bugging the heck out of me. I too had followed the Lifehacker article. I was more interested in the title and alt on images and links, but works all the same.

    Comment by Matt on January 23, 2007 @ 8:28 am
  10. You’re welcome.

    Comment by dan on January 23, 2007 @ 3:26 pm
  11. I’m another saved by your detective work, Dan. Thanks for posting about this. I too had used a number of the Lifehacker tips and also hadn’t made the connection between the tootips and the title/alt text.

    Much appreciated!


    Comment by Light & Dark on April 3, 2007 @ 11:14 pm
  12. Paul: Glad I could help.

    Comment by dan on April 4, 2007 @ 11:06 am

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