foreword
Using Edge to open guacamole will automatically prompt the clipboard permission. After setting the permission, you can directly use Ctrl+C, Ctrl+V to copy and paste directly, instead of opening the menu through Ctrl+Alt+Shift to operate. By default, Firefox does not allow direct Ctrl+C, Ctrl+V, and relevant settings need to be made.
setup steps
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Enter in the Firefox address bar
about:configto open "Advanced Preferences" and choose to accept the risk.
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Enter "clipboard" in the search bar, find "dom.events.testing.asyncClipboard", and click the switch button behind.
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The value of the "dom.events.testing.asyncClipboard" setting item becomes "true", indicating that it has been set successfully.
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After opening guacamole, you can directly use Ctrl+C, Ctrl+V.