Works perfectly fine for me. Try removing the adblock and reinstalling it, or go through adblock filter settings, checking every button and option.

Do the above.

Forum; Adblock Plus Homepage {web link}

You may have ad / mal-ware. Further information can be found in the Troubleshoot Firefox issues caused by malware article.

Run most or all of the listed malware scanners. Each works differently. If one program misses something, another may pick it up.

Your Question Details > More System Details shows that you have the Adblock Plus Pop-up Add-on extension, but not the normal version of Adblock Plus. Since most ads are either embedded in the page or overlaid on the page, most ads are not actually pop-up windows of the kind targeted by pop-up blockers.

You probably need to reinstall Adblock Plus to supplement what you have:

https://addons.mozilla.org/firefox/addon/adblock-plus/

Either that or you have malware, but hopefully you just need to reinstall Adblock Plus.

i have the ad block plus, but if turned off, my yahoo mail will autofill from contacts, and still crashing but if turned on, no autofill on contacts and yes hanging freezing crashing, does anyone hae solution? i did safe mode to isolate and it is the adblock plus, if i knew the correct script to put into filters, maybe this would fix it? this is beyond annoying...

You also asked;

yahoo mail autofill contacts not working in updated firefox using adblock plus https://support.mozilla.org/questions/1095326