For v7.0: I just tested it again to verify and yes the issue appears to be fixed in v7. I cannot promise how reliable it is because I haven't developed in v7 for production processes yet because we're still on 6.10.1, but I've used v7.0 on my own machine a fair bit, and browser mode seems to work well and with no limitations that I can find at the moment.
For all versions including v6.10.1 and below: It turns out that the way this works, unfortunately, is that the way Sarang describes it is what happens when Fixed Port Mode is turned OFF (When the Browser Connectivity Checkbox is UNCHECKED at the bottom of System tab > System > Settings). When that checkbox is unchecked, Ephemeral Port mode is on. When using this mode, Blue Prism cannot attach to an instance of a browser that was manually launched. I agree that it should not be this way, but not much we can do if Blue Prism says that's how it has to be for now.
The workaround is to make the checkbox CHECKED in order to use Fixed Port Mode (Turn off Ephemeral Port Mode). There are some benefits and drawbacks to each, but I've found having that box CHECKED in general is a better experience. The main limitation is that you cannot use two browsers at once. You can use two instances of Edge at once but not Edge and Chrome at the same time because the port will conflict.
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Dave Morris
Cano Ai
Atlanta, GA
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Dave Morris, 3Ci at Southern Company