Separate Security Issue: Update your Flash Player or remove it using these links; http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-windows.html Uninstall Flash Player | Windows http://helpx.adobe.com/flash-player/kb/uninstall-flash-player-mac-os.html Uninstall Flash Player | Mac

Note: Windows users should download the ActiveX for Internet Explorer. and the plugin for Plugin-based browsers (like Firefox).

Note: Windows 8 and Windows 10 have built-in flash players and Adobe will cause a conflict. Install the plugin only. Not the ActiveX.

Flash Player Version: Version 30.0.0.113

https://get.adobe.com/flashplayer/ Direct link scans current system and browser Note: Other software is offered in the download. <Windows Only>

https://get.adobe.com/flashplayer/otherversions/ Step 1: Select Operating System Step 2: Select A Version (Firefox, Win IE . . . .) Note: Other software is offered in the download. <Windows Only> +++++++++++++++++++ See if there are updates for your graphics drivers https://support.mozilla.org/en-US/kb/upgrade-graphics-drivers-use-hardware-acceleration

Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

No safe mode doesn't solve the problem, if you didn't understand question well everytime i press shift it just opens sidebar. i probably changed some hotkey accidentaly and now i can't use shift.... because it opens the bar instead of doing whats it supposed to do....only in mozilla

The bookmarks sidebar would normally open iwth the Ctrl+B keyboard shortcut.

Did you try to close and restart Firefox or reboot the computer?

yes the exact same thing ctrl and b open, opens when i just press shift.... i even tried reinstalling firefox and deleting all data but it doesn't work and reboot the pc

this thing on the left opens whenever i use shift https://i.imgur.com/ZhhBQ6V.png

Firefox doesn't have a feature to change keyboard shortcuts. (I don't think Firefox add-ons can modify the Shift key except in combination with other keys.)

Is it possible some other program on your system is translating the Shift key to Ctrl+b? Perhaps not, if it only happens in Firefox...

Do you use any software that could modify keys sent to Firefox? Some users report odd issues with "anti-keylogger" features of security software (like ZoneAlarm) because Firefox gets a different keycode than expected.