Setidaknya ada dua perjalanan pengguna yang terpengaruh di add-on Classroom:
Alur Single Sign-On (SSO) Google
Membuka tab baru untuk pengguna
SSO Google
Selama alur SSO Google, pengguna akan diarahkan ke dialog untuk login ke Akun Google mereka dan menyetujui berbagi data.
Gambar 1. Visualisasi tiga konteks cookie yang berbeda selama SSO
dari dalam iframe: (1) aplikasi Classroom tingkat teratas, (2) iframe
yang disematkan pihak ketiga (DavidPuzzle di localhost dalam kasus ini), dan (3) dialog
OAuth tingkat teratas.
Dalam penerapan add-on yang umum, cookie sesi ditetapkan setelah proses login ini selesai. IFrame add-on, yang berada dalam konteks sematan, dimuat ulang, kini dengan cookie sesi, sehingga pengguna dapat mengakses sesi yang diautentikasi. Namun, jika cookie pihak ketiga dinonaktifkan, situs dalam konteks sematan seperti iframe add-on tidak dapat mengakses cookie dari konteks level teratas masing-masing. Untuk add-on Classroom, pengguna tidak dapat mengakses sesi yang diautentikasi dan terjebak dalam loop login.
Untuk penerapan yang menetapkan cookie sesi dalam konteks iframe sematan,
masalah ini dapat diatasi dengan CHIPS API, yang memungkinkan situs sematan
menetapkan dan mengakses cookie yang dipartisi (cookie yang diberi kunci pada embedder dan
domain sematan). Namun, penerapan yang menetapkan cookie sesi dalam
konteks tingkat teratas dialog login tidak dapat mengakses cookie
tanpa partisi di iframe, sehingga mencegah login.
Tab baru
Karena alasan serupa, jika pengguna memiliki sesi yang diautentikasi berbasis cookie di iframe add-on, dan iframe meluncurkan pengguna ke tab tingkat teratas baru untuk aktivitas, tab tingkat teratas tidak dapat mengakses cookie sesi yang dipartisi dari iframe. Hal ini mencegah status sesi iframe tetap ada di aktivitas tab baru dan mungkin memaksa pengguna untuk login lagi di tab baru, misalnya.
CHIPS API tidak dapat menyelesaikan masalah ini, berdasarkan desain; cookie iframe yang dipartisi tidak dapat diakses dalam konteks tingkat teratas.
Tindakan developer
Ada beberapa tindakan yang harus Anda pertimbangkan untuk memastikan add-on Anda terus berfungsi sebagaimana mestinya saat Chrome menghentikan penggunaan cookie pihak ketiga.
Jelajahi Storage Access API. Untuk semua penerapan add-on, sebaiknya Anda mempelajari Storage Access API (SAA) Storage Access. SAA memungkinkan iframe untuk
mengakses cookie di luar konteks iframe. SAA tersedia di Chrome hari ini, dan didukung oleh aplikasi Classroom.
Ikut serta dalam FedCM. Selain itu, jika Anda menggunakan GIS, library Login dengan Google, panduan resmi dari tim Identitas adalah mengaktifkan
FedCM. Hal ini tidak menggantikan kemampuan cookie pihak ketiga, tetapi pada akhirnya akan
diperlukan di GIS sebagai bagian dari penghentian penggunaan cookie pihak ketiga. FedCM tersedia di Chrome saat ini dan didukung di Classroom, tetapi perilaku dan fiturnya masih dalam pengembangan dan terbuka untuk menerima masukan.
Bermigrasi ke GIS. Jika Anda menggunakan library GSIv2 yang tidak digunakan lagi, yang juga dikenal sebagai
library Login dengan Google, sebaiknya Anda bermigrasi ke GIS, karena dukungan untuk GSIv2 ke depannya tidak jelas.
Ajukan permohonan penundaan uji coba penghentian penggunaan. Chrome menawarkan uji coba penghentian penggunaan untuk memungkinkan kasus penggunaan non-iklan menunda efek penghentian penggunaan cookie pihak ketiga. Jika disetujui, Anda akan diberi token yang dapat digunakan di
add-on untuk mengaktifkan cookie pihak ketiga bagi asal Anda hingga tahun 2024, sekaligus
bermigrasi ke solusi jangka panjang seperti SAA. Setelah menerapkan, Anda akan
diminta untuk memberikan ID atau link bug untuk laporan kerusakan. Tim kami telah mengajukan masalah ini untuk add-on Classroom dan Anda dapat memberikan bug ini.
[[["Mudah dipahami","easyToUnderstand","thumb-up"],["Memecahkan masalah saya","solvedMyProblem","thumb-up"],["Lainnya","otherUp","thumb-up"]],[["Informasi yang saya butuhkan tidak ada","missingTheInformationINeed","thumb-down"],["Terlalu rumit/langkahnya terlalu banyak","tooComplicatedTooManySteps","thumb-down"],["Sudah usang","outOfDate","thumb-down"],["Masalah terjemahan","translationIssue","thumb-down"],["Masalah kode / contoh","samplesCodeIssue","thumb-down"],["Lainnya","otherDown","thumb-down"]],["Terakhir diperbarui pada 2025-08-29 UTC."],[],[],null,["# Prepare for the third-party cookie deprecation\n\n| **Warning:** Chrome has [announced](https://privacysandbox.com/news/privacy-sandbox-update/) that **third-party (3P) cookies are no longer being deprecated** . The guidance described here is no longer necessary, and **add-ons should not be impacted in\n| early 2025**. However, Chrome intends to further elevate user choice around 3P cookies, so there could still be a future where 3P cookie access is more limited than it is today. Therefore, this guide might still be helpful for developers interested in understanding how 3P cookies are used in add-ons and future-proofing against potential changes in 3P cookie availability as the Chrome user experience evolves.\n\nThis guide helps you understand the impact and necessary changes to your add-on\nintroduced by [Chrome ending support for third-party cookies](https://privacysandbox.com/intl/en_us/open-web/#how-works-on-web-hero).\n\nOverview\n--------\n\nOn **January 4, 2024** , Chrome introduced [Tracking Protection](https://blog.google/products/chrome/privacy-sandbox-tracking-protection/), which restricts\nwebsite access to third-party (3P) cookies by default, to 1% of users. In\n**early 2025** , Chrome expects to [phase out 3P cookies completely](https://privacysandbox.com/intl/en_us/open-web/#the-privacy-sandbox-timeline).\n\nAt least two user journeys are impacted in Classroom add-ons:\n\n1. The Google single sign-on (SSO) flow\n2. Launching users into new tabs\n\n### Google SSO\n\nDuring the Google SSO flow, users are navigated to a dialog to sign into their\nGoogle Account and consent to data sharing.\n\n**Figure 1.** Visualization of the three different cookie contexts during SSO\nfrom within an iframe: (1) the top level Classroom app, (2) the 3P embedded\niframe (DavidPuzzle on localhost in this case), and (3) the top level OAuth\ndialog.\n\nIn a typical add-on implementation, a session cookie is set at the completion of\nthis sign-in process. The add-on iframe, which is in an *embedded context* , is\nreloaded, now with the session cookie, allowing the user to access their\nauthenticated session. However, when 3P cookies are disabled, sites in an\nembedded context like add-on iframes can't access cookies from their respective\n*top level* contexts. For Classroom add-ons, the user is unable to access their\nauthenticated session and becomes stuck in a sign-in loop.\n\nFor implementations that set the session cookie in the embedded iframe context,\nthis issue can be mitigated by the [CHIPS API](https://developers.google.com/privacy-sandbox/3pcd/chips), which allows embedded sites to\nset and access partitioned cookies (cookies keyed on both the embedder and\nembedded domain). However, implementations that set the session cookie in the\ntop level context of the sign-in dialog are unable to access the unpartitioned\ncookie in the iframe, preventing sign-in.\n\n### New tabs\n\nFor similar reasons, if a user has a cookie-based authenticated session in an\nadd-on iframe, and the iframe launches the user into a new top level tab for an\nactivity, the top level tab is unable to access the partitioned session cookie\nfrom iframe. This prevents iframe session state from persisting to the new tab\nactivity and might force the user to sign in again in the new tab, for example.\nThe [CHIPS API](https://developers.google.com/privacy-sandbox/3pcd/chips) is not able to resolve this issue, by design; the partitioned\niframe cookies are inaccessible in a top level context.\n\nDeveloper actions\n-----------------\n\nThere are a few actions you should consider to ensure your add-on continues to\nfunction as intended as Chrome phases out 3P cookies.\n\n1. **Audit** [3P cookie usage](https://developers.google.com/privacy-sandbox/blog/cookie-countdown-2023oct#audit) in your add-on's critical user journeys. More specifically, [test with 3P cookies disabled](https://developer.chrome.com/blog/cookie-countdown-2023oct/#test) to evaluate the impact for your specific implementation.\n2. **Explore Storage Access API** . For all add-on implementations, we recommend\n that you explore the [Storage Access](https://developers.google.com/privacy-sandbox/3pcd/storage-access-api) API (SAA). SAA enables iframes to\n access their cookies outside the iframe context. SAA is available in Chrome\n today, and is supported by the Classroom app.\n\n | **Note:** If your SSO flow does not set cookies in the dialog context and your add-on does not launch users into top-level tabs, you might not need SAA. Explore the simpler [CHIPS API](https://developers.google.com/privacy-sandbox/3pcd/chips) to see if it meets your needs.\n3. **Opt-in to FedCM** . In addition, if you use [GIS](https://developers.google.com/identity/gsi/web/guides/overview), the Sign in with Google\n library, the official guidance from the Identity team is to [opt-in to\n FedCM](https://developers.google.com/identity/gsi/web/guides/fedcm-migration). This does not replace 3P cookie capabilities but it will eventually\n be required in GIS as part of the 3P cookie deprecation. FedCM is available\n in Chrome today and supported in Classroom, but behavior and features are\n still [under development](https://github.com/fedidcg/FedCM) and open to feedback.\n\n4. **Migrate to GIS** . If you use the deprecated [GSIv2 library](https://developers.google.com/identity/sign-in/web/sign-in), also known as\n the Google Sign-In library, it is strongly recommended that you [migrate to\n GIS](https://developers.google.com/identity/gsi/web/guides/migration), as support for GSIv2 going forward is unclear.\n\n5. **Apply for a deprecation trial delay** . Chrome is offering a [deprecation\n trial](https://developers.google.com/privacy-sandbox/blog/third-party-cookie-deprecation-trial) to allow non-advertising use cases to delay the effects of the 3P\n cookie deprecation. If accepted, you'll be given a token that you can use in\n your add-on to keep 3P cookies enabled for your origin through 2024, while\n migrating to a long term solution like SAA. After [applying](https://developers.google.com/privacy-sandbox/blog/third-party-cookie-deprecation-trial#apply_for_the_deprecation_trials), you'll be\n asked to provide a bug ID or link for a breakage report. Our team has\n already filed this for Classroom add-ons and you can provide [this bug](https://issuetracker.google.com/issues/273552829).\n\n| **Warning:** Developers who are accepted into the deprecation trial will automatically have 3P cookies enabled during a [grace period](https://developers.google.com/privacy-sandbox/blog/third-party-cookie-deprecation-trial#:%7E:text=We%20acknowledge%20that,the%20grace%20period) even without the token in their app. Be aware of this caveat if you'd like use the 1% deprecation to test your how your add-on functions without 3P cookies.\n| **Note:** The deprecation trial is intended for *existing* applications. If you're building an add-on today, plan to build with SAA or another implementation that allows the add-on to function without 3P cookies. You might not qualify for the deprecation trial if you don't already have an affected application.\n| **Note:** Chrome has [announced a timeline](https://privacysandbox.com/intl/en_us/news/update-on-the-plan-for-phase-out-of-third-party-cookies-on-chrome/) shift in the 3P cookie phaseout from the second half of 2024 to early 2025. This change might impact duration of the deprecation trial, and this page will be updated to reflect changes."]]
