Delegation tab does not work on Firefox Testnet add-on

Browser: Firefox 71.0 (64-bit)

Yoroi Version installed: Network: shelley-testnet Current version: 2.2.2 Commit: f9e2d53e9b33246856cb2b0812c2bf07e7d2060c

Behavior: In Delegation (Simple) tab, the scroller keeps scrolling forever, the list of pools never populates, and the search bar doesn’t work. For comparison’s sake, I have the same exact version of the extension installed on Brave (Chrome-like), and the Delegation tab works well.

Errors observed in Javascript console: [⚠] Request to access cookie or storage on “<URL>[]=0&performance[]=100&source=firefox&mozId=87f1bbd9-ceb2-422c-8db9-85cd3ea881f3&userAda=32419&delegated=%5B%22288888620f1b200ebdff48034d805be8df8bbc70d560fb720863ad1fb957cdda%22%5D&locale=en-US” was blocked because we are blocking all third-party storage access requests and content blocking is enabled.

[❗] The operation is insecure.
kuH4@https://testnet.seiza-website.emurgo.io/_next/static/chunks/commons.f4cc13a1cb372579e979.js:1:918689
i@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:538
obyI/<@https://testnet.seiza-website.emurgo.io/_next/static/chunks/commons.f4cc13a1cb372579e979.js:1:1011970
obyI@https://testnet.seiza-website.emurgo.io/_next/static/chunks/commons.f4cc13a1cb372579e979.js:1:1015394
i@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:538
1TCz@https://testnet.seiza-website.emurgo.io/_next/static/JPqG51d6STPPrYI5fiuZa/pages/_app.js:1:28281
i@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:538
3Ckp/<@https://testnet.seiza-website.emurgo.io/_next/static/JPqG51d6STPPrYI5fiuZa/pages/_app.js:1:36486
value/<@https://testnet.seiza-website.emurgo.io/_next/static/runtime/main-5cb09bdc6e9c1c243c2f.js:1:6421
value@https://testnet.seiza-website.emurgo.io/_next/static/runtime/main-5cb09bdc6e9c1c243c2f.js:1:6596
H@https://testnet.seiza-website.emurgo.io/_next/static/runtime/main-5cb09bdc6e9c1c243c2f.js:1:11243
fLxa@https://testnet.seiza-website.emurgo.io/_next/static/runtime/main-5cb09bdc6e9c1c243c2f.js:1:11295
i@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:538
LwBP@https://testnet.seiza-website.emurgo.io/_next/static/runtime/main-5cb09bdc6e9c1c243c2f.js:1:3488
i@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:538
1@https://testnet.seiza-website.emurgo.io/_next/static/runtime/main-5cb09bdc6e9c1c243c2f.js:1:608
i@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:538
r@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:387
t@https://testnet.seiza-website.emurgo.io/_next/static/runtime/webpack-be30b84510d2aa002225.js:1:250
@https://testnet.seiza-website.emurgo.io/_next/static/chunks/commons.f4cc13a1cb372579e979.js:1:47
commons.f4cc13a1cb372579e979.js:1:1227874

[SebastienGllmt]

Seiza is our blockchain explorer which is what keeps track of all the pools in Cardano and information about them. When you want to select a pool to delegate to, we embed Seiza into an iframe and show that in Yoroi. This allows us to have the same staking UI in Seiza, the Yoroi extension and Yoroi mobile so it saves a lot of engineering time. Seiza itself is what is asking for cookies and probably we can disable this when it’s embedded inside Yoroi

[SebastienGllmt]

Works for me on multiple machines and I know it’s worked for other users. Are you sure you don’t have some Firefox setting that is blocking the operation? Notably your error says content blocking is enabled. Maybe something like https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Privacy/Storage_access_policy/Errors/CookieBlockedForeign ?