Please use the Suggestion Box

You didn't state what box you were talking about. Pressing <Cntr> J will open Firefox download in a separate window. This is plenty big. If you were talking about an Add-On, the one I am using displays in a small box for each down-load, but if you put the mouse on one of the boxes, it will show a pop-up with detailed information. If this message does not answer your question, let up know what down-loader you are using.

If you want the old download manager back, go to about:config, click the I'll be careful, I promise! button. Then search for "download", and set the browser.download.useToolkitUI preference to true (double-click it).

You can modify some aspects of Firefox's interface using style rules. There are two ways to apply the rules: (1) creating a file named userChrome.css and (2) using the Stylish extension. There are some other threads here with the procedural details, but here are some rules I tested out and a screen shot of the result.

@namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
#downloads-indicator {padding-top:0 !important; padding-bottom:0 !important;}
#downloads-indicator-counter {font-size:15px !important;}
#downloads-indicator-progress {height:10px !important; width:30px !important;}

Note that the first line (@namespace) is only needed once regardless of the number of rules.

Thank you all I am in Mozilla Firefox While not computer illiterate, some of the replies will take some thinking out for myself. The thing that I was getting at was that in the last few months Mozilla has had updates and pre 2013 when I started a download (audio as in software which can be over two hours worth or more to download) a good sized download progress box would come up to indicate time to download end. Easy to see from a distance initially and when when you are working at something else. For the vision impaired or the elder person without 20/20 vision the arrow which turns into a very small box with a very small green line as a bar graph on the upper right of the screen, is most difficult to see.

Many thanks for your replies Paiter

I created an add-on that pops up a download window. I haven't announced it because it doesn't work in private windows. If you don't care about showing downloads in private windows, you could take a look.

On the following page, click the "View" button, then click the download button (arrow button to the right of the "eye" button):

https://builder.addons.mozilla.org/user/jscher2000/

Many thanks to jscher and everybody

Best Regards Paiter

Thank you feer56. Your suggestion was exactly what I was looking for, big window with big bar and big text for really bad eyesight.