better proxy handling

packages/flutter_mozilla_components/javascript/container_proxy/src/background/BackgroundMain.ts

@@ -55,8 +55,8 @@ export default class BackgroundMain {
     )
   }
 
-  // TODO: Fix in @types/firefox-webext-browser
   async onRequest(requestDetails: Pick<_OnRequestDetails, 'cookieStoreId' | 'url' | 'tabId'>): Promise<DoNotProxy | ProxyInfo[]> {
+    if (requestDetails.tabId > -1) {
       const tab = (await browser.tabs.get(requestDetails.tabId))
 
       if (tab.cookieStoreId?.startsWith(containerIdentifier) === true) {
@@ -65,6 +65,10 @@ export default class BackgroundMain {
 
           const proxies = await this.store.getProxiesForContainer(cookieStoreId)
 
+          if (proxies === null) {
+            return doNotProxy
+          }
+
           if (proxies.length > 0) {
             proxies.forEach(p => {
               if (p.type === ProxyType.Http || p.type === ProxyType.Https) {
@@ -98,6 +102,7 @@ export default class BackgroundMain {
           return [emergencyBreak]
         }
       }
+    }
 
     return doNotProxy
   }

packages/flutter_mozilla_components/javascript/container_proxy/src/store/Store.ts

@@ -119,13 +119,13 @@ export class Store {
     }
   }
 
-  async getProxiesForContainer(cookieStoreId: string): Promise<ProxySettings[]> {
+  async getProxiesForContainer(cookieStoreId: string): Promise<ProxySettings[] | null> {
     const relations = await this.getRelations()
 
     const proxyIds: string[] = relations[cookieStoreId] ?? []
 
     if (proxyIds.length === 0) {
-      return []
+      return null
     }
 
     const proxies = await this.getAllProxies()