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yahoo mail disables sidebar and recent apps list

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When moving my mouse pointer to the top corners (left for apps, right for sidebar) they work fine until i open my yahoo mail. Once this is open they stop working. It also disables the windows icon button in the lower left corner. I need to alt/tab to switch between apps and need to use the windows key on the keypad to return to apps page. To restore back to normal i need to restart the laptop. Im using HP Envy with i7 processor. I do not use IE browser at all, only nightly.

When moving my mouse pointer to the top corners (left for apps, right for sidebar) they work fine until i open my yahoo mail. Once this is open they stop working. It also disables the windows icon button in the lower left corner. I need to alt/tab to switch between apps and need to use the windows key on the keypad to return to apps page. To restore back to normal i need to restart the laptop. Im using HP Envy with i7 processor. I do not use IE browser at all, only nightly.

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I'm not sure how Yahoo/Firefox can disable system features...

Is Firefox switching to full screen view? You can switch between full screen and normal view using the F11 key on the keyboard. There's also a permission setting you can change to stop sites from switching to full screen without permission.*

If Firefox is just maximized and not in full screen view, does double-clicking the Firefox title bar to switch the window from maximized to resizable make any difference?

* To check on that:

While viewing a page on that site, use either:

  • right-click and choose View Page Info > Permissions
  • Alt+t (open the classic Tools menu) > Page Info > Permissions

If "Enter Fullscreen" is set to "Allow" instead of "Always Ask", switch it to "Always Ask".

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Does this only happen with the Firefox 32 Nightly build?

Note that there have been issues reported with Yahoo mail, but those are reported to have been fixed by Yahoo.

  • bug 1017134 - Yahoo! Mail is not working on today's Nightly

You can reload web page(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • Hold down the Shift key and left-click the Reload button
  • Press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • Press "Command + Shift + R" (Mac)

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 > "Use custom settings for history" > 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