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Firefox keeps pressing "left arrow"

DL
DL
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For example, when I open a window that's too big for my display or try to view a big image file in a window, it scrolls right. When I press CTRL or ALT, the keyboard shortcut for CTRL+Left Arrow (increases window size) and ALT + Left (back one page, but really back ALL the pages :P ) Arrow keep getting activated. I can type just fine in the window and in the URL bar, I just can't select any shortcut because the constant "left"-ing makes the shortcuts/saved searches/passwords unselectable.

Can someone please help? I closed and restarted Firefox, I disabled any add-ons (Video Download Helper and uBlock Origin are all that I'm running) and still this keeps happening. As someone who uses keyboard shortcuts a LOT, this is quite frustrating.

For example, when I open a window that's too big for my display or try to view a big image file in a window, it scrolls right. When I press CTRL or ALT, the keyboard shortcut for CTRL+Left Arrow (increases window size) and ALT + Left (back one page, but really back ALL the pages :P ) Arrow keep getting activated. I can type just fine in the window and in the URL bar, I just can't select any shortcut because the constant "left"-ing makes the shortcuts/saved searches/passwords unselectable. Can someone please help? I closed and restarted Firefox, I disabled any add-ons (Video Download Helper and uBlock Origin are all that I'm running) and still this keeps happening. As someone who uses keyboard shortcuts a LOT, this is quite frustrating.

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jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
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That sounds really annoying. When did this start?

I'm wondering whether Firefox somehow is misinterpreting signals from your keyboard, mouse, or touchpad. If you haven't already, it may be worth doing a normal shutdown and restart of Windows.

When I press CTRL or ALT, the keyboard shortcut for CTRL+Left Arrow (increases window size) and ALT + Left (back one page, but really back ALL the pages :P ) Arrow keep getting activated.

I wasn't aware that Ctrl+Left Arrow did anything in Firefox. Are you saying on yours it resizes the window itself (presumably for a resizable window rather than a maximized window) or the content within the window (like zoom)?