Do not panic. Instead, check the top of this page for a message that Firefox blocked the installation.
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If the installation was blocked, follow the
instructions below.
To unblock installation from Google
1a. Click 'Edit Options...' in the bar at the top of the page.
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The Firefox 'Allowed Sites' window will appear.
1b. Enter
tools.google.com in the box under 'Address of web site'.
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1c. Click 'Allow' to add Google to the list of allowed sites, then click 'Close'.
1d. You will need to click 'Agree and Install' a second time to begin installation.
