For saving out of the default (on Windows) you can use application called "Link Shell Extension" a graphical mklink install then on the target directory right click & chose "pick link source" then right click on default directory & chose "Drop As.." & chose symbolic link or Junction then you will have the target directory in the default directory & the directory name to "Save in" setting.
http://schinagl.priv.at/nt/hardlinkshellext/linkshellextension.html
You need Administrator right

I sat here for over 6 hours trying to get the code you provided to work. Unless you show Screen Capture of how to use Download folder to mklink /j to another drive folder and a actual working code that does not give red errors like "mklink /D C:\path\to\symlink D:\path\to\actual" I know mklink /j \default_download_dir is right, because C:\Downloads does not work. Plus Everything on internet says you have to do this Admin Command Prompt. Which I got to work. Question remains since you do not show or produce no REAL example of how to display such in on SaveIn Menu . Sure I can Create many new folders in Download folder but What I save I do not want in the download folder. I am not one who needs to Save things to Newly Created folders. I can understand adding Existing folders to SaveIn.

C:\Downloads > D:\ Picture Folder

"A symlink is needed to save outside the default download directory" ....
(mklink /j \default_download_dir D:\Picture_Temp\New_Sort_Temp ) ERROR.

(mklink /j \default_download_dir \Picture_Temp\New_Sort_Temp ) ERROR.

Wiki
Example:

mklink /D "C:\Users\\Appdata\Local\Plex Media Server" "G:\Plex Media Server"

" Quotes" and : Red Error

Aunque lleva un poco de tiempo entender la configuración, es flexible y poderoso, se puede hacer realmente cualquier cosa.
Excelente, muchas gracias por este importante complemento.

Not user friendly, make the user do all the leg work. This is not very clear on how to setup and when there are other competing add-ons that do the same but much easier its hard to justify jumping through the hoops. (ok FF just broke all the add-ons so I'm probably not using this shit anymore, but my opinion still stands)

NOT userfriendly

On some sites, pictures have a link without an extension, for example:
http: //***.info/pics.php? q = up9% 2B77xAPRJrpRYH% 2F4% 2BC6vJ5CbLhqlstelNXijqA1J3OASEH6ivsjTiaA03I3RN1y6nEcC
They are saved as "pics.php"
How can I make them save with the "jpg" extension?

I would give this five stars if AVAST would stop reporting it as and UNTRUSTWORTHY add-on and asking me if I would like to remove it!

Great Add-On !

To "anonymous user 5f8d7a": I found a workaround to this rule by modifying the browser's default download folder in >Preferences to an upper level of folder (Home in my case since I am using Linux). Hope it help.

Excellent add-on. It would be still more useful if one could save pages to .url shortcuts in the default directory (without all the nested subdirectories). That is, "save pages shortcuts" in the same exact way as "save links shortcuts". Also, it would great if there were toolbar button for saving page shortcuts.

With symlinks, this extension works well for my needs. One function I would add if possible is to open a dialog if the file being saved has a duplicate name in the directory instead of automatically renaming it.

I have a lot of links like "download.php&id=1234". This extension saves all those links as file with "download.php" name. While FF itself honors Content-Disposition response header (filename parameter).

please add save this website as a link. (Any OS) (Need replacement for SaveLink 4.0.1 by prudnik)

This is good replacement for a non-working "Save Link/Image in Folder". Using symlinks is a very easy way to get around the "default directory" limitation
Although sometimes downloading failed. The reason is not clear, because after a while the same file (or image) in the same tab is downloaded properly. Upd: probably this happens only on Tumblr.
If you have a file with the same name in the folder, it is automatically renamed by adding (1). But I would like that in this case there was a "Save as..." window for renaming or canceling the download.
Also it would be nice to be able to give the names of the menu items are different from the folder paths.

Easy Install, good function!

Any chance of supporting subfolders off the context menu?

eg, so rather than having a huge list of folders directly off the context menu, have each nested folder appear as a submenu off the previous?

eg,

images/vehicles/cars
images/vehicles/boats
images/animals/cats
images/animals/dogs
images/animals/flying
images/animals/flying/birds
images/animals/flying/bats

would result in a context menu with just "Images >" in it, expanding to the next level would show two more options, "Vehicles >" and "Animals >", and offer a "Save Here" option. Expanding Animals would offer "Dogs" "Cats" and "Flying >", etc. Basically, the functionality of the old "Save File To" addon? I'm not sure if 57+ even allows submenus within context menus? (Even if you had to set them up initially, unlike Save File To which auto-generates the context menus, it would be very helpful.)

I just think it would save a huge amount of screen real-estate, and be a lot more user-friendly for those of us who work with a lot of nested folders. :) But, addon works exactly as described, thanks!

Also, to "anonymous user 5f8d7a", the limitation to within downloads is part of the new framework for non-dialog automated saving. It's true of all addons. If you want to save outside your downloads folder, then it has to offer you a save dialog box each time, in which case you might as well just right-click, save.

perfect replacement for Save Image in Folder after every extension i used to rely on stopped working without substitution in FF57. except that I had to learn to make symlink, which took me 10-15min, it works exactly the same. thank you very much

Strange restriction on the path only to the download directory makes the plugin completely useless.

Easy to use,Good addons!

Good replacement for Context Menu Image saver. Would it be possible to add an option so that if the filename already exists that it would show a quick pop-up that gives you the option to Overwrite or Rename the file instead of automatically renaming it. I've got the show save as dialog pop-up turned on now, but would rather just a quick Overwrite or Rename option instead.

Thanks......

nice, but I'd like the option to access sub-directories via the context menu. (having to make a separate entry for each sub-directory can easily make for a cluttered mess)

I'm trying to find alternative addons of "Save in images in Folder."
It is very helpful, and provides all the core functions I need.