A question about Chrome and Firefox

Although Firefox has been my browser of choice for sometime I've had to stop using it because I get this with some sites which have https like Google, YouTube, Yahoo etc.

It's something to do with the Certificates being out of date and there are suggestions on various forums that the computer system clock is not correct. Mine is correct so I'm baffled. Anyone got any ideas?

Anyway, I've switched to Chrome which works fine on all sites. However, there is one aspect that irks me. When I click on someone's photo on this forum it opens up as a huge image which overflows the screen. On Firefox it used to fit within the screen. Does anyone know how to tweak Chrome so that it fits within the screen?

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Tony

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