Download Foscam Firmware
This is from the readme.txt of the latest firmware I used on these cameras:
The new firmware is suitable for FI9803EP,FI9803P,FI9853EP,FI9851P,FI9821P V2,FI9826P V2,FI9831P V2,FI9821W V2.1,FI9821EP
System firmware version: 1.5.3.13
App firmware version: 2.x.2.18
Plug-in version: 3.3.0.7
Improvements:
1) Add new plug-in for Chrome;
2) Optimize the Time Synchronization Server settings;
3) Optimize the Recroding Location settings;
4) Add settings example below configuration option in Email and FTP settings;
5) Optimize the login password security level;
6) Enable motion detection by default excpet the Camera and PC sound;
7) Add new feature to customize the snapshot name which uploaded to FTP;
8) Fix the DST bug;
9) Fix the bug cannot fetch MJPEG video stream;
10) Add the pushing message function;
11) More user friendly web ui.
Attention: After upgrading to this new firmware version, you cannot downgrade to previous versions.
**EDIT** (at a much later date) It appears Foscam has locked down the previously accessible pages to get the latest firmware. You must email them for a link or if you can, use the web interface of the camera to directly download it to your computer on the same network.