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Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

page loads to small ICON above tol bar but won't open to full sixe page

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Page opens to small window above toolbar but won't expand to full size page

Page opens to small window above toolbar but won't expand to full size page

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Can you open its system menu via Alt+Space and resize the window via that menu ?

You can try to go to full screen via F12 to have at least a browser window. You can try to rename/remove xulstore.json in the Firefox profile folder with Firefox closed.

You can use the button on the "Help -> More Troubleshooting Information" (about:support) page to go to the current Firefox profile folder or use the about:profiles page (Root directory).