Hey @justvibinhere, I hope you're well today!
When downloading through the Dropbox website, there isn't currently a way to download while having the option to pause/resume.
If you prefer to have the option to pause and resume I could suggest using the desktop app to instead sync the files locally to your computer.
With this method, you would need to have enough space in your Dropbox account to hold the data you want to download as it would need to be added to your account first.
I hope this info helps, let me know if you have any questions!