Many Ubuntu based Linux distros has Firefox installed as the default browser. There's an add-on that I discovered years ago that's better than many of the paid alternatives for download management in 'Down Them All'. Just go to the Menu, look for Add-ons, and click onto it. You'll be presented with a page that allows to search for add-ons, and unlike some, Down Them All (DTA) isn't constantly using resources, only when in use, and one of the free apps that I donate to each year, around the holidays.
Just type or copy/paste Down Them All into the Search box in the upper right of the add-ons page, and it'll be presented for install. Once installed, you'll have a choice with every download to use the standard method just by clicking OK, or choose DTA to drop the file in any folder you desire, sometimes I'll find a useful app for Windows & I'll place it in my Data drive, in the Downloads folder there. By default, these will be downloaded in one's regular Downloads folder on any OS.
This can help a lot with 'timeout' issues, as there's controls (by default it'll keep trying for 5 minutes if the link drops), this time can be increased if needed. The other thing about DTA is that it milks every last drop of speed possible to get downloads, often exceeding the ISP speed one's paying for. Not to worry, you won't be charged for that.
That's the first thing I suggest trying & there's the option to also copy/paste the MD5, SHA1 or SHA-256 hashes of a file. There's been a few times when the hash didn't match with Linux Mint ISO's, this could be due to changes added to the ISO & a new MD5 wasn't posted for it. The only thing that I do know, is that the Linux Mint versions still were OK & ran fine. They do make occasional changes to the ISO to include updated drivers. or other minor changes.
When possible, especially with Linux distros (this may not apply to all), you can choose a faster server to download from, I've found the James Madison University site to be the fastest of the US servers. With this distro, you may or may not have a choice of servers.
Me too its why I donate 20 bucks to Canonical every time I install a Ubuntu based distro. I just wouldn’t trust some ISO made by some person selling them on Ebay or Amazon.
Me too, Nick!
I support my Linux distro, not quite the way you do, yet I do make donations to Linux Mint at least 4 times per year, even if $25 is all I can afford. Being that I have lots of Windows & MS Office software that I seldom use, compared to Linux Mint, I feel it's just the rightful thing to do for those who can afford it. The donation can be anything affordable, or if purchasing a Linux Mint ISO, grab it from their Store.
That's no typo, they even sell computers preinstalled with Linux Mint. One has an option of an i7-4770K CPU & up to 32GB of DDR3 RAM.