Hi, I see you have the add-on Right-Click-Link. Try disabling it in the Add-ons Manager, because it may be interfering with the default behaviour.

If your question is resolved by this or another answer, please take a minute to let us know. Thank you.

I have remove the right-clink link and still have the same problem. Quite frustrating.

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.

• Switch to the DEFAULT theme: "3-bar" menu button or Tools > Add-ons > Appearance
• Do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/kb/Safe+Mode
• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes