NOTE: Use BrowserStack or similar service to test on different web browser versions.
# Testing Flash uploader
# open Internet Explorer 8 web browser
# login to Admin Console
# go to {nav Custom > Widgets} section
# upload large (several MB in size) image into `Image` field
# confirm, that:
* upload progress bar was displayed
* image was uploaded
* inspecting over `Browse` button would show that SWF file is placed over it
# Testing HTML5 uploader
# open Internet Explorer 10 web browser
# login to Admin Console
# go to {nav Custom > Widgets} section
# upload large (several MB in size) image into `Image` field
# confirm, that:
* upload progress bar was displayed
* image was uploaded
* inspecting over `Browse` button won't show that SWF file is placed over it