Tried your "Download Star" v1.0.1, on Windows 10, in Firefox (FF) v57.0.4 with ABP, NoScript, etc.

it could not download Files, even after selecting a file from shown list of files on extension's pop-down dialog box !
EDIT: when FF was restarted once, then downloading began to work.

Please add option/feature to EDIT the URL. Currently there is no option to edit the URL.

Some websites do support HTTPS based file download, but they show HTTP based download url on their HTTPS based site !

And, some websites (for example: "www.example.com") show/share their downloadable files (for example: "http://sourceforge.com/projects/ProjName/filename", "http://download.example.com/filename", ...) as HTTP url, located on another/3rd-party(3P)/subdomain based website(s). And those 3P-websites/subdomains may actually support HTTPS based encrypted connection for securely downloading files, (for example: "https://sourceforge.com/projects/ProjName/filename", "https://download.example.com/filename", ...).

So in those/such case(s), we NEED TO EDIT/CHANGE THE (HTTP) URL by little bit into (HTTPS based url).

Please also make sure this works : when a website's subdomain (for example: "https://download.example.com", "https://cdn.example.com", ...) based webpage is actually using a multi-domain SSL-cert or wildcard SSL-cert or it's primary-domain's (www.example.com) SSL-cert, then such SSL-cert needs to be accepted/approved by user, for encrypted file download from that subdomain.

Some websites using self-signed SSL-cert based (or DNSSEC-signed TLSA/DANE based) file download, and these type of file downloading need to be supported as well.

Please also set the downloaded file's (creation+MODIFIED) DATE to same-date as it is in download/source website's server, Or please show an option for selecting that function. Currently its not saving the source server's correct file modified-date.

Thanks in advance.