I have tried watching MLBTV on Edge, Chrome, and Firefox. Every time I can't because it says I need to enable the flash player. The problem with that is that flash is enabled on every single browser. So now I can't watch a service for which I pay. None of the other forums I've seen are any help because they just tell you to enable the flash player. However, Hulu and Netflix both work, and don't they use flash player? So it doesn't make any sense.
I use Windows 10.
<moderator: added 'mlbtv' to title>
Most browser vendors are moving to Flash click-to-play by default, which means Flash is disabled by default. If content isn't configured to how the different browsers handle this it makes it difficult for users to enable Flash and view Flash content. This is a browser vendor/content creator issue, not Adobe/Flash Player issue.
What is the Windows 10 Edition, Version and OS Build? Go to Settings > System > About to obtain this information
Most of the major browsers are engaging in an effort to make Flash Player "click-to-play", which in many instances, breaks content that would otherwise work.
The following guides might be helpful in getting things working the way that you'd like: