Consider the following mockup:

When a firmware is being updated, display a thin (5px height) progress bar beneath it. An animated progress bar is probably even better.
Display a warning regarding the left USB cable to be easily noticeable.
Don't display the firmware update log by default. Display the Expand link from the moment the log has any text. Display the expand/collapse text, whichever is relevant, and expand/collapse the log upon clicking the link.
Consider the following mockup:
When a firmware is being updated, display a thin (5px height) progress bar beneath it. An animated progress bar is probably even better.
Display a warning regarding the left USB cable to be easily noticeable.
Don't display the firmware update log by default. Display the Expand link from the moment the log has any text. Display the expand/collapse text, whichever is relevant, and expand/collapse the log upon clicking the link.