Crash report: `QuotaExceededError: The quota has been exceeded.`

URL

https://app.uniswap.org/#/swap?chain=mainnet

swap state

{
  "INPUT": {
    "currencyId": "ETH"
  },
  "OUTPUT": {
    "currencyId": null
  },
  "independentField": "INPUT",
  "typedValue": "",
  "recipient": null
}

Error

QuotaExceededError: The quota has been exceeded.

Stacktrace

setItem@[native code]
@https://app.uniswap.org/static/js/main.c667c312.chunk.js:1:146000
rs@https://app.uniswap.org/static/js/4.28e90265.chunk.js:2:3629485
Su@https://app.uniswap.org/static/js/4.28e90265.chunk.js:2:3649698
@https://app.uniswap.org/static/js/4.28e90265.chunk.js:2:3648433
Eu@https://app.uniswap.org/static/js/4.28e90265.chunk.js:2:3648497
su@https://app.uniswap.org/static/js/4.28e90265.chunk.js:2:3642218
su@[native code]
Hi@https://app.uniswap.org/static/js/4.28e90265.chunk.js:2:3582681
@https://app.uniswap.org/static/js/4.28e90265.chunk.js:2:3639621

Device data

{
  "ua": "Mozilla/5.0 (iPhone; CPU iPhone OS 13_1 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) CriOS/76.0.3809.123 Mobile/15E148 Safari/605.1",
  "browser": {
    "name": "Chrome",
    "version": "76.0.3809.123",
    "major": "76"
  },
  "engine": {
    "name": "WebKit",
    "version": "605.1.15"
  },
  "os": {
    "name": "iOS",
    "version": "13.1"
  },
  "device": {
    "vendor": "Apple",
    "model": "iPhone",
    "type": "mobile"
  },
  "cpu": {}
}

Start by reproducing the swap URL on the reported iPhone and Chrome setup, then trace the setItem call shown in the stack trace and identify the storage operation that raises QuotaExceededError. Done means the swap page no longer crashes when storage quota is exceeded, with the existing swap state still usable.