First of all, this is my first post. If this is in the wrong place let me know and I'll move it.
I've had a lot of trouble finding info on modpacks and how to get them working. Once you get the client set up, it seems like it'd be easy, right? Just go to mods tab and click install on the one you want. Well, not always. My internet is slow so the client occasionally gives me a timeout error when trying to download a modpack. Or sometimes clicking install on the client just doesn't work. Since google is pretty useless at this point with results leading to unanswered posts or outdated info, here's what you do:
Go to "Browse Modpacks" and click on the mod you want
In the upper right click on the "Website" button
Again in the upper right, click "Install" which will bring you to a new page
Delete "client=y" from the URL and hit enter to reload the page
Wait for the countdown and instead of opening the client, the download should start in your browser
Getting it to work in the client:
Once the .zip file has finished downloading, select "Create Custom Profile" on the client. (found next to "My Modpacks" and "Browse Modpacks")
Click "import" and select the .zip
Wait for the client to install the mod like normal
Wonder why it was so gosh darn hard to find a guide for this
And that's it! This should fix any issues with downloading mods through the client while letting you still use the client as your hub for modding. Hope this turns up in google searches and helps some people.
This post might be confusing some people as the title is inaccurate, the title should be "Manually Downloading Mods", not "Installing Modpacks Manually". In the post itself it states...
"Wait for the client to install the mod like normal"
So its not describing how to install a mod manually, it is using the client. I think this post is for people who are trying to use the client to download the mod and then install it, and the OP has a problem with the download timing out - "so the client occasionally gives me a timeout error when trying to download a modpack".