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'use strict';
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-let port = null;
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-let backendInitialized: boolean = false;
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-
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-connectPort();
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-sayHelloToBackendManager();
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+window.addEventListener('pageshow', function ({target}) {
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+ // Firefox's behaviour for injecting this content script can be unpredictable
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+ // While navigating the history, some content scripts might not be re-injected and still be alive
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+ if (!window.__REACT_DEVTOOLS_PROXY_INJECTED__) {
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+ window.__REACT_DEVTOOLS_PROXY_INJECTED__ = true;
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-// The backend waits to install the global hook until notified by the content script.
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-// In the event of a page reload, the content script might be loaded before the backend manager is injected.
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-// Because of this we need to poll the backend manager until it has been initialized.
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-const intervalID = setInterval(() => {
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- if (backendInitialized) {
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- clearInterval(intervalID);
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- } else {
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+ connectPort();
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sayHelloToBackendManager();
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+
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+ // The backend waits to install the global hook until notified by the content script.
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+ // In the event of a page reload, the content script might be loaded before the backend manager is injected.
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+ // Because of this we need to poll the backend manager until it has been initialized.
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+ const intervalID = setInterval(() => {
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+ if (backendInitialized) {
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+ clearInterval(intervalID);
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+ } else {
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+ sayHelloToBackendManager();
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+ }
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+ }, 500);
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+ }
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+});
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+
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+window.addEventListener('pagehide', function ({target}) {
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+ if (target !== window.document) {
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+ return;
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}
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-}, 500);
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+
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+ delete window.__REACT_DEVTOOLS_PROXY_INJECTED__;
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+});
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+
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+let port = null;
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+let backendInitialized: boolean = false;
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function sayHelloToBackendManager() {
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window.postMessage(