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My menu bar disappeared (maybe I pressed a wrong button before). In other words: I cannot select File, Bookmarks, options, Help etc. How can I reactivate the menu bar?

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My Firefox looks like this at the top now: Line 1: Icons for page backward, forward, refresh, stop, homepage and then the entry filed for Urls. This was line 2 before, I had the Browser menu as line one and cannot reactivate it. Line 2: Pdfforge ( aplugin for Firefox) Below is only the browsing area

My Firefox looks like this at the top now: Line 1: Icons for page backward, forward, refresh, stop, homepage and then the entry filed for Urls. This was line 2 before, I had the Browser menu as line one and cannot reactivate it. Line 2: Pdfforge ( aplugin for Firefox) Below is only the browsing area

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Firefox 3.6+ versions have a feature to allow the user to hide the Menu bar.

Hit the Alt key to temporarily show the Menu bar, then open View > Toolbars and select Menu bar, so it has a check-mark.
The F10 can also be used on most PC's to temporarily reveal the Menu bar.

https://support.mozilla.com/en-US/kb/Menu+bar+is+missing