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Why does Firefox refuse to allow me to sign in at Yahoo.com? Every time I click sign in a new blank window appears and no login???????

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  • 4 have this problem
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  • Last reply by cor-el

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Whenever I am on yahoo.com and I click sign in to sign in to the site. Firefox opens and new blank window but never, never loads the sign-in screen. WHY?????!!!!!

I have been a user of Firefox for a long, long, time, but this is frustrating to the point of never using firefox again!

Whenever I am on yahoo.com and I click sign in to sign in to the site. Firefox opens and new blank window but never, never loads the sign-in screen. WHY?????!!!!! I have been a user of Firefox for a long, long, time, but this is frustrating to the point of never using firefox again!

Chosen solution

Clear the cache and cookies only from websites that cause problems.

"Clear the Cache":

  • Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window.

There are other things that need your attention.

Note that your System Details List shows multiple Flash plugins.

  1. Shockwave Flash 12.0 r0
  2. Shockwave Flash 11.4 r402

You can find the installation path of all plugins on the about:plugins page.

You can check the Flash player installation folder for multiple Flash player plugins and remove all (older) version(s) of the plugin (NPSWF32) and (re)install the latest Flash player.

  • (32 bit Windows) C:\Windows\System32\Macromed\Flash\
  • (64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\
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All Replies (1)

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Chosen Solution

Clear the cache and cookies only from websites that cause problems.

"Clear the Cache":

  • Firefox/Tools > Options > Advanced > Network > Cached Web Content: "Clear Now"

"Remove Cookies" from sites causing problems:

  • Firefox/Tools > Options > Privacy > Cookies: "Show Cookies"

Start Firefox in Safe Mode to check if one of the extensions (Firefox/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem (switch to the DEFAULT theme: Firefox/Tools > Add-ons > Appearance).

  • Do NOT click the Reset button on the Safe Mode start window.

There are other things that need your attention.

Note that your System Details List shows multiple Flash plugins.

  1. Shockwave Flash 12.0 r0
  2. Shockwave Flash 11.4 r402

You can find the installation path of all plugins on the about:plugins page.

You can check the Flash player installation folder for multiple Flash player plugins and remove all (older) version(s) of the plugin (NPSWF32) and (re)install the latest Flash player.

  • (32 bit Windows) C:\Windows\System32\Macromed\Flash\
  • (64 bit Windows) C:\Windows\SysWOW64\Macromed\Flash\