The file size in those cases is only displayed after the download has been started. That may not be a huge problem for users with 10 or more MBit and a Internet traffic flatrate, but users who have to pay per Megabyte downloaded may prefer to know how much they are downloading before they start.

The same may be true for users with slow Internet connections. Instead of downloading a file at the limit for some time, they might prefer to postpone the download to times where it can be downloaded without interrupting work.

Show File Size is a basic, but very helpful Firefox extension. The add-on integrates new information into the Save download windows of the browser. Here it displays the file size and type in a new row. This works well for many different file downloads. There may be situations where it cannot display the file size, but we have not encountered any during our tests.

show file size

With the additional information provided, the user can make the decision to download the file, or cancel it completely or for the time being.

Show File size is compatible with Firefox 3.6 to Firefox 4 versions. It is available for download at the official Mozilla Firefox Add-on repository.

Update: Show File Size has been discontinued. It is not available anymore. An alternative is the add-on Get File Size which can return the size of a remote file in the Firefox web browser.

Treesize is partition based which means that it scans the selected partition and displays the folders of that partition in a tree view sorted by the size of the files contained in the folder and possible subfolders. A plus in front of a folder means that subfolders exist. All subfolders can be expanded as well so that the user can see which subfolder of the current folder occupies most of the space on that partition.

A right-click menu is offered that provides several interesting features. It is possible to expand all folders in the selected structure and display a folder count. Explore opens a new Windows Explorer window of the select folder which makes it easy to delete files that are no longer needed.

Another interesting option is to switch between several folder size views. The default view displays the size of the folders. Other available views are a file count which displays the folders with the most files on top, a cluster size view and the size in percentages. Items can be sorted by name or size and the values can be either shown in Kilobytes, Megabytes, Gigabytes or custom metrics.

Treesize is one of those programs that you run from time to time when hard drive or partition space is getting low. Compatible to Windows 95 to Windows Vista.