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How can you disable the top bar in the pdf viewer?

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I'm using the chrome browser, using this extension -> https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm\ It ports the firefox pdf viewer for use in the chrome browser. I wanted to find a way to disable the top bar in the viewer, or hide it. Is there a way to do that?

I'm using the chrome browser, using this extension -> https://chrome.google.com/webstore/detail/pdf-viewer/oemmndcbldboiebfnladdacbdfmadadm\ It ports the firefox pdf viewer for use in the chrome browser. I wanted to find a way to disable the top bar in the viewer, or hide it. Is there a way to do that?

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Your question is about modifying the way a Chrome extension displays the pdf.js viewer? I think you probably need to ask the author of the extension about that. Any Firefox settings wouldn't really be relevant.

I'm not sure why you want to hide the bar, but for a cleaner reading experience, you could click the button on that black toolbar for Full Screen/Presentation Mode.