how do I keep one instance of firefox instead of multiple instances of firefox?
Instead of additional tabs opening I get multiple browsers..............help
Instead of additional tabs opening I get multiple browsers..............help
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Try to start Firefox in Safe Mode by holding down the Shift (Mac: Options) key to see if that helps.
Start Firefox in Safe Mode to check if one of the extensions (3-bar Menu button/Tools > Add-ons > Extensions) or if hardware acceleration is causing the problem.
- Switch to the DEFAULT theme: 3-bar Menu button/Tools > Add-ons > Appearance
- Do NOT click the Reset button on the Safe Mode start window
- https://support.mozilla.org/kb/Safe+Mode
- https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes
Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.