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Upon startup on my mac, I get a text edit box that opens

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Upon start up on my mac, I get a small Firefox box the opens and inside it has strange characters in it. I have no idea what this is.

This happened

Every time Firefox opened

6 months ago

Troubleshooting information

bookmark88Pnˇ9( œ˜∞AîmApplicationsFirefox.appr ?

Alle svar (1)

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Do you have that problem when running in the Firefox SafeMode? http://support.mozilla.com/en-US/kb/Safe+Mode Don't select anything right now, just use "Continue in SafeMode."

If not, see this: http://support.mozilla.com/en-US/kb/troubleshooting+extensions+and+theme...