Thank you for the information.

Because of this delay problem in Opera, I have had to remove Opera as my default browser in favor of Firefox 43 64-bit.

I have 728 font files. I applied the workaround that you suggested without any speed improvement to Opera.

Both Firefox and Chrome have their 64-bit versions and they are very fast: Firefox 43 64-bit and Chrome 47.0.2526.106 m (64-bit).

Other browsers like Firefox 43 64-bit and Chrome 47.0.2526.106 m (64-bit) do not have these problems.

Note: Once a new Tab becomes active (after waiting for a while) and at this point it is then possible to enter a web address in the address box, the web page then loads quickly.

Thanks leocg for the information, the problem has been solved in Opera 33.0.1990.58.

I was not aware of this update since in Opera 32.0.1948.69, the "About Opera" kept indicating that "Opera is up to date".

This problem is still present in Opera 32.0.1948.69.

Note: None of the following browsers have this problem with the Address Box: Internet Explorer 10, Firefox 39.0, Chrome 43.0.2357.132

Thanks for your advice. Changing the Windows theme to one of the Windows Default theme brings back the Address box.

Opera 30.0.1835.88 is incompatible (Address box greyed out) with all of the Windows High Contrast themes and also the Custom variation of the Windows High Contrast theme that I use.

Previous versions of Opera did not have problems with the Custom variation of the Windows High Contrast theme that I use (I have been using Opera for years).

I hope the Opera team will correct this problem.

When I select it, nothing in the address field is highlighted, everything in the address field remains greyed out.