1.51 migration crash when lot of tabs are open

[iccub]

Description:

Steps to Reproduce

1. Install a 1.50 build.
2. Add a lot of tabs. On dev builds go to settings and scroll down tap 'add 1000 tabs' once or twice
3. Upgrade to 1.51 or newer

Actual result:

The app will freeze for 20 seconds then crash

Expected result:

Reproduces how often: [Easily reproduced, Intermittent Issue]

Brave Version:

• Can you reproduce this issue with the most recent build from TestFlight?
• Can you reproduce this issue with the previous version of the current build from TestFlight?
• Can you reproduce this issue with the current build from AppStore?

Device details:

Website problems only:

• did you check with Brave Shields down?
• did you check in Safari/Firefox (WkWebView-based browsers)?

Additional Information

[hffvld]

Verified on iPhone 14using version(s):

Device/OS: iPhone 14 [iOS 16.6]
Brave build: 1.57 (23.8.18.20)
BraveCore: 1.57.47 (116.0.5845.96)

---

Upgrade 1.50 to 1.51 - PASS

STEPS:
Followed the steps from #7865 (comment)

ACTUAL RESULTS:

• Verified that Brave is not freezing or crashing when a lot of tabs (1000 - 2000) are opened

---

1000 tabs

1000.tabs_1.50.mov

2000 tabs

2000.tabs_1.50.mov

Upgrade 1.56 to 1.57 - PASS

STEPS:
Followed the steps from #7865 (comment)

ACTUAL RESULTS:

• Verified that Brave is not freezing or crashing when a lot of tabs (1000 - 2000) are opened

---

1000 tabs

1000.tabs_1.56.mov

2000 tabs

2000.tabs_1.57.mov