I have the same issue when viewing on my laptop screen. I find it fairly straightforward to zoom out to view an image then zoom back to 100% immediately after so text size is not an issue.
In Windows you can use Ctrl & + or - as a shortcut which makes it easy to view.
On my desktop 27" monitor I can see the images fine so I suspect yours is a lower resolution.
An alternate way is to download and if you have jpeg preferences set to PS the image will directly load into PS, Ctrl 1 will give actual size Ctrl 0 will fit screen. My screen is 23"" so I find the large images a pain in the proverbial because anything higher than about 1050px in height does not fit my browser screen image.