Is there a way to identify the domain of the page/tab that a storage entry was created on? I want to store a couple of small preferences on a per-site basis; on one hand cookies would be perfect but I don’t necessarily want the prefs to be sent to the remote server on every request (or at all!)
You can use a storage with domain as a key (or value).
Domain as a value:
browser.storage.set({ myData: { domain: window.location.hostname, value: "whatever" } })
Domain as a key:
const domain = window.location.hostname;
browser.storage.set({ [`myData_${domain}`]: "whatever" })
Domain as a key inside a value:
const domain = window.location.hostname;
const {myData} = await browser.storage.get('myData');
myData[domain] = "whatever";
await browser.storage.set({myData});