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Automatically block & unblock tabs #115

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d2ada20
npm security audit & bringing extension up to date
fzahner Jan 6, 2026
d26c3fa
statically importing CSS so it conforms with Firefox CSP
fzahner Jan 6, 2026
a263c15
implementing refresh functionality after pause timer expires
fzahner Jan 6, 2026
9339dc6
fixed timer expiry bug
fzahner Jan 6, 2026
9a06d7b
now auto unblocking tabs during pause or when turning blocker off
fzahner Jan 6, 2026
78a1bbe
removed all console logs
fzahner Jan 6, 2026
3e0a7f3
better error handling
fzahner Jan 6, 2026
43d176e
Update src/ImpulseBlocker.js
fzahner Jan 9, 2026
9d40cca
Update package.json
fzahner Jan 9, 2026
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1 change: 1 addition & 0 deletions extension/options.html
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Impulse Blocker</title>
<link rel="stylesheet" href="dist/options.css" />
</head>
<body>
<div id="root"></div>
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1 change: 1 addition & 0 deletions extension/popup.html
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Original file line number Diff line number Diff line change
Expand Up @@ -4,6 +4,7 @@
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Impulse Blocker</title>
<link rel="stylesheet" href="dist/popup.css" />
</head>
<body>
<div id="root"></div>
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24,423 changes: 11,318 additions & 13,105 deletions package-lock.json
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18 changes: 9 additions & 9 deletions package.json
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Expand Up @@ -2,34 +2,34 @@
"scripts": {
"watch": "webpack --mode=development --watch",
"build": "webpack --mode=development",
"release": "webpack --mode=development && web-ext build --source-dir extension --config web-ext-config.js",
"browser": "web-ext run --browser-console --source-dir extension",
"release": "webpack --mode=development && web-ext build --source-dir extension --config web-ext-config.mjs",
"browser": "web-ext run --browser-console --source-dir extension --devtools",
"test": "jest"
},
"devDependencies": {
"@babel/core": "^7.12.10",
"@babel/preset-env": "^7.12.11",
"@babel/preset-react": "^7.12.10",
"@types/jest": "^26.0.20",
"babel-jest": "^26.6.3",
"babel-jest": "^30.2.0",
"babel-loader": "^8.2.2",
"clean-webpack-plugin": "^1.0.1",
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Copilot AI Jan 9, 2026

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The webpack has been upgraded from v4 to v5, but the clean-webpack-plugin is still at v1.0.1 which is not compatible with webpack 5. This will cause build errors. The plugin should be updated to v3.0.0 or later, or you should use webpack 5's built-in asset cleaning feature by setting 'output.clean: true' in webpack.config.js.

Suggested change
"clean-webpack-plugin": "^1.0.1",
"clean-webpack-plugin": "^3.0.0",

Copilot uses AI. Check for mistakes.
"core-js": "^3.8.2",
"css-loader": "^2.1.1",
"css-loader": "^7.1.2",
"eslint": "^7.17.0",
"eslint-config-airbnb": "^18.2.1",
"eslint-plugin-import": "^2.22.1",
"eslint-plugin-jest": "^24.1.3",
"eslint-plugin-jsx-a11y": "^6.4.1",
"eslint-plugin-react": "^7.22.0",
"eslint-plugin-react-hooks": "^4.2.0",
"file-loader": "^3.0.1",
"jest": "^26.6.3",
"file-loader": "^6.2.0",
"jest": "^30.2.0",
"react-test-renderer": "^16.14.0",
"style-loader": "^0.23.1",
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Copilot AI Jan 9, 2026

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The style-loader is still at v0.23.1, which is incompatible with webpack 5. This package should be updated to v3.0.0 or later for webpack 5 compatibility. However, if the intention is to extract CSS into separate files (as suggested by the HTML changes), this should be replaced with mini-css-extract-plugin instead.

Suggested change
"style-loader": "^0.23.1",
"style-loader": "^3.0.0",

Copilot uses AI. Check for mistakes.
"web-ext": "^5.5.0",
"webpack": "^4.46.0",
"webpack-cli": "^3.3.12"
"web-ext": "^9.2.0",
"webpack": "^5.104.1",
"webpack-cli": "^6.0.1"
},
"dependencies": {
"@babel/polyfill": "^7.12.1",
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101 changes: 86 additions & 15 deletions src/ImpulseBlocker.js
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Original file line number Diff line number Diff line change
@@ -1,9 +1,9 @@
import dayjs from 'dayjs';
import dayjs from "dayjs";

import extensionStatus from './enums/extensionStatus';
import Website from './storage/Website';
import PopupIcon from './PopupIcon';
import { createMatchPatterns, redirectToBlockedPage } from './utils/functions';
import extensionStatus from "./enums/extensionStatus";
import Website from "./storage/Website";
import PopupIcon from "./PopupIcon";
import { createMatchPatterns, redirectToBlockedPage } from "./utils/functions";

class ImpulseBlocker {
constructor(storageHandler) {
Expand All @@ -16,6 +16,8 @@ class ImpulseBlocker {
this.start = this.start.bind(this);
this.stop = this.stop.bind(this);
this.getBlockedDomains = this.getBlockedDomains.bind(this);
this.refreshBlockedTabs = this.refreshBlockedTabs.bind(this);
this.enableBlockedTabs = this.enableBlockedTabs.bind(this);
}

boot() {
Expand All @@ -39,7 +41,7 @@ class ImpulseBlocker {

const pausedUntilParsed = dayjs(pausedUntil);

const differenceFromNow = pausedUntilParsed.diff(dayjs(), 'second');
const differenceFromNow = pausedUntilParsed.diff(dayjs(), "second");

if (differenceFromNow < 0) {
return this.start(false);
Expand All @@ -61,8 +63,8 @@ class ImpulseBlocker {
if (domainsToBlock.length > 0) {
browser.webRequest.onBeforeRequest.addListener(
redirectToBlockedPage,
{ urls: domainsToBlock, types: ['main_frame'] },
['blocking'],
{ urls: domainsToBlock, types: ["main_frame"] },
["blocking"],
);
}

Expand All @@ -72,15 +74,15 @@ class ImpulseBlocker {

onStorageUpdated(changes) {
if (changes.sites === undefined) {
return Promise.resolve('No need for action');
return Promise.resolve("No need for action");
}

return this.storageHandler.getStatus().then(({ status }) => {
if (status === extensionStatus.ON) {
return this.attachWebRequestListener();
}

return Promise.resolve('No need for action');
return Promise.resolve("No need for action");
});
}

Expand All @@ -89,8 +91,11 @@ class ImpulseBlocker {
await this.storageHandler.setStatus(extensionStatus.OFF);
}

await browser.webRequest.onBeforeRequest.removeListener(redirectToBlockedPage);
await browser.webRequest.onBeforeRequest.removeListener(
redirectToBlockedPage,
);
await PopupIcon.off();
await this.enableBlockedTabs();
}

async start(setStatus = true) {
Expand All @@ -100,19 +105,84 @@ class ImpulseBlocker {

await this.attachWebRequestListener();
await PopupIcon.on();
await this.refreshBlockedTabs();
}

// Refreshes all tabs which are in the block list
// This triggers the Impulse Blocker window if they should be blocked
// Intended when starting the blocker or coming back from a pause
async refreshBlockedTabs() {
// Get a list of open tabs which are in the block list
const allTabs = await browser.tabs.query({});
const blockedDomains = await this.getBlockedDomains();
const tabsToRefresh = allTabs.filter((tab) => {
if (!tab.url) {
return false;
}
try {
const tabUrl = new URL(tab.url);
const tabDomain = tabUrl.hostname.replace(/^www\./, "");

return blockedDomains.some((blockedDomain) => {
const cleanedBlockedDomain = blockedDomain.replace(/^www\./, "");
return (
tabDomain === cleanedBlockedDomain ||
tabDomain.endsWith(`.${cleanedBlockedDomain}`)
);
});
} catch (e) {
// Invalid URL, skip this tab
return false;
}
});

// Refresh each tab with a blocked domain
tabsToRefresh.forEach((tab) => {
browser.tabs.reload(tab.id);
});
}

// Finds all active Impulse Blocker windows (sites in a blocked state) and replaces them with the site they are blocking
// Intended for automatically removing all the blocks from windows (during a pause or after turning blocker off)
async enableBlockedTabs() {
const allTabs = await browser.tabs.query({});
allTabs.forEach((tab) => {
if (!tab.url) {
return;
}
try {
const tabUrl = new URL(tab.url);
if (tabUrl.protocol === "moz-extension:") {
if (!tabUrl.searchParams.has("target")) {
return;
}
const target = tabUrl.searchParams.get("target");
browser.tabs.update(
tab.id,
{
loadReplace: true,
url: target,
},
);
}
} catch (e) {
return;
}
});
}

async pause(duration = 60 * 5, setStatus = true) {
browser.webRequest.onBeforeRequest.removeListener(redirectToBlockedPage);

const pausedUntil = dayjs().add(duration, 'seconds');
const pausedUntil = dayjs().add(duration, "seconds");

if (setStatus) {
await this.storageHandler.setStatus(extensionStatus.PAUSED);
}

await this.storageHandler.setPausedUntil(pausedUntil);
await PopupIcon.off();
await this.enableBlockedTabs();

setTimeout(() => {
this.start();
Expand All @@ -128,7 +198,8 @@ class ImpulseBlocker {
}

getBlockedDomains() {
return this.storageHandler.getBlockedWebsites()
return this.storageHandler
.getBlockedWebsites()
.then((storage) => storage.sites.map((website) => website.domain));
}

Expand Down Expand Up @@ -159,7 +230,7 @@ class ImpulseBlocker {
}

addToBlockList(domain) {
const domainToBlock = domain.replace(/.*www\./, '');
const domainToBlock = domain.replace(/.*www\./, "");

return this.storageHandler.getBlockedWebsites().then(({ sites }) => {
const updatedWebsites = [...sites, Website.create(domainToBlock)];
Expand All @@ -169,7 +240,7 @@ class ImpulseBlocker {
}

removeFromBlockList(domain) {
const domainToRemove = domain.replace(/.*www\./, '');
const domainToRemove = domain.replace(/.*www\./, "");

return this.storageHandler.getBlockedWebsites().then((storage) => {
const updatedWebsites = storage.sites.filter(
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1 change: 0 additions & 1 deletion src/options/index.js
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@@ -1,6 +1,5 @@
import React from 'react';
import ReactDOM from 'react-dom';
import './options.css';

import MessageTypes from '../enums/messages';
import DomainListItem from './components/DomainListItem';
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4 changes: 4 additions & 0 deletions src/popup/components/Pause/PauseSection.js
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Expand Up @@ -66,6 +66,10 @@ export default class PauseSection extends React.Component {

const secondsToExpire = expiresAt.diff(currentDatetime, 'second');

if (secondsToExpire <= 0) {
clearInterval(this.countdownTimer);
this.props.onChange();
}
this.setState({ secondsToExpire });
}

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1 change: 0 additions & 1 deletion src/popup/index.js
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@@ -1,6 +1,5 @@
import React from 'react';
import ReactDOM from 'react-dom';
import './popup.css';
import cogs from './cogs.svg';

import ExtensionStatus from './components/ExtensionStatus';
Expand Down
2 changes: 1 addition & 1 deletion web-ext-config.js → web-ext-config.mjs
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@@ -1,4 +1,4 @@
module.exports = {
export default {
ignoreFiles: [
'package.json',
'package-lock.json',
Expand Down