[toolbox] the debugger tab flashes when you add a breakpoint

[jasonLaster]

It's pretty subtle, but occasionally when you add a breakpoint the debugger tab in the toolbox will flash green. The bug is in the toolbox here

[AnshulMalik]

Here is some info that might help:

We show green icon when the debugger is paused and blue, when it's not. So when we add a breakpoint, debugger goes to paused state and adds the breakpoint and resumes. The process is sometimes slow when we see this flash.

I don't know why we need to pause the debugger to add a breakpoint.

[darkwing]

I'd noticed this too! Glad you foudn the problem!

[jasonLaster]

https://bugzilla.mozilla.org/show_bug.cgi?id=1465089#c2