Browser: Runtime stability

[inancgumus]

What?

Stabilize the browser module in runtime.

Why?

To provide a better user experience and trust in running multi-VU browser tests safely.

Tasks

Major issues

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1. Run 1000+ VUs: Isolate browser contexts #1112
   8 of 8
   feature internal optimization performance team/k6browser +5
   
2. Deadlock: Multi-VU many iterations #971
   7 of 7
   bug remote team/k6browser +3
   
3. Deadlock: Navigation stops when request interception is enabled #1072
   10 of 10
   bug internal network manager remote +4
   

Primary issues

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1. Deadlock one single iteration test #1253
   bug +1
   
2. Move Sobek entirely out of the business logic #1064
   2 of 16
   epic productivity refactor stability +4
   
3. Initiate internal goroutines after a component tree is ready #1247
   0 of 3
   bug evaluate events internal +4
4. ElementHandle: nil pointer dereference #1056
   bug user request +2
5. Nil pointer dereference in session.Execute #1208
   bug +1
6. Panic on attaching iframe when getting browser window ID #1224
   bug +1
7. Concurrent map iteration and write #1375
   0 of 5
   bug next remote +3
8. Dispose: Cannot find context with specified id (-32000) #1144
   2 of 2
   bug +1
   
9. Data race due to concurrent map access #1066
   2 of 2
   bug next +2
   
10. Creating new page in browser context sometimes times out #966
    bug next remote +3
    
11. Concurrent write error with waitForEvent.js example script #1048
    bug next +2
    
12. Panic: Unexpected end of JSON input #987
    5 of 5
    bug remote +2
    
13. Deadlock: Another element is intercepting with pointer action #1004
    bug next remote +3

Several other issues might be related to the primary deadlock issues above.

Possible related issues

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1. Goroutine leaks #237
   bug +1
2. Intermittent issues occur when using page.waitForNavigation() after element.click() #557
   bug +1
3. Incorrect error message when docker image ran on ARM machine #1029
   bug +1
4. BrowserContext can't be created for reused VUs #1067
   bug next +2
5. Dynamic URL cause high memory usage #1165
   bug +1
6. Deadlock: TestPageWaitForFunction #637
   bug +1
7. Clicking on a link that opens a new tab never navigates to the href link #827
   1 of 2
   bug next user request +3
   
8. frame.waitForSelector waits indefinitely #1252
   3 of 3
   bug user request +2
   
9. panic: runtime error: invalid memory address or nil pointer dereference #1148
   2 of 2
   bug +1
   
10. Nil when getting the DocumentID #577
    2 of 2
    bug next +2
    
11. Sobek runtime shouldn't be accessed while parsing options in async APIs #1162
    14 of 14
    bug +1
    
12. Remove Sobek from Execution Context Eval #1182
    8 of 8
    bug refactor +2
    
13. Investigate Uncaught (in promise) when evaluating JS: execution context changed #973
    bug next remote ux +4
    
14. Frame requestByID panics when initializing networking #986
    3 of 3
    bug next remote +3