The `functional-samples/sample.dnr-rule-manager` example allows the user to add and remove `chrome.declarativeNetRequest` rules on demand from the extension's options page.
Rules require to have a unique `id`, so the extension fetches the list of all the currently defined rules, takes the max and adds 1.
When no rule is defined, this results in `Math.max(...[]) + 1` => `Math.max() + 1` => `-Infinity + 1` => `-Infinity` and since the `id` should be an integer and not an number, the extension throws an error.
Ensuring that `0` is always a parameter of `Math.max` should solve the problem.
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