Android will recognize a forum post and offer to use Tapatalk or a web browser. If you have Tapatalk installed it will default to that program on its own until you reset the application settings. I use Firefox on my PC and Chrome on Android with Picture Resizer app to shrink photos by 50%. Honestly, I wish the forum would simply auto-shrink photos. You don't get the photo size too large message until after your photo is uploaded, so the bandwidth has already been used. Just install a simple server side script to shrink large files. It's not rocket science.