Add manual scenario to verify that network polling stops when UI is closed

[chloeYue]

What is this about?

We've identified a release-blocking issue where a periodic polling task continues to run every 20 seconds, even after the UI is closed. This results in generating a big amount of unnecessary API requests to Etherscan and to the RPC provider:

API request to Etherscan:
https://api.etherscan.io/api?

3 to RPC provider:

"jsonrpc":"2.0","method":"eth_blockNumber",
"jsonrpc":"2.0","method":"eth_getBlockByNumber"
jsonrpc":"2.0","method":"eth_call","params":

This ticket aims to add a manual scenario to ensure this issue is prevented in the future.

Slack discussion: https://consensys.slack.com/archives/C07CGH75GFN/p1721233816417369
Related PR attempt to fix this issue: #25909

To repro the bug:

• Install MM
• Open the service worker dev console
• Open and close the pop up
• Go to the network tab of the dev console and see that requests, they continue to occur approximately every 20 seconds.

Scenario

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Design

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Technical Details

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Threat Modeling Framework

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Acceptance Criteria

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Stakeholder review needed before the work gets merged

• Engineering (needed in most cases)
• Design
• Product
• QA (automation tests are required to pass before merging PRs but not all changes are covered by automation tests - please review if QA is needed beyond automation tests)
• Security
• Legal
• Marketing
• Management (please specify)
• Other (please specify)

References

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