# BlockClock (also known as Strict Workflow)

> Enforces a 25min/5min workflow: 25 minutes of distraction-free work, followed by 5 minutes of break, pomodoro style. Repeat as necessary. Enforced by blocking websites.

Canonical page: [https://chrome-stats.com/d/blockclock?hl=ja](https://chrome-stats.com/d/blockclock?hl=ja)

## Overview

- **ID:** `blockclock`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** lolrepeatlol
- **Category:** other
- **Daily users:** 101
- **Weekly downloads:** 1
- **Rating:** 5.00 / 5 (8 ratings)
- **Version:** 2.0.2
- **Last updated:** 2022-04-21
- **First published:** 2020-08-03
- **Size:** 392 KB
- **Data as of:** 2026-09-05
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/blockclock/)
- **Website:** [https://github.com/lolrepeatlol/BlockClock](https://github.com/lolrepeatlol/BlockClock)

## Description

BlockClock is a strict Pomodoro technique Chrome extension designed to boost your productivity by enforcing 25-minute distraction-free work sessions followed by 5-minute breaks. Unlike other timers, BlockClock does not allow cancellation once a session starts, ensuring you stay committed to your workflow. It helps enforce focus by blocking distracting websites during work intervals.

This extension is a fork of the formerly known Strict Workflow, updated for Firefox compatibility and rebranded as BlockClock. It remains open source and actively maintained, with future feature enhancements planned. Developers and users can access the source code on GitHub to explore or contribute.

## Rankings

- #11,592 — Overall
- #60 — minute
- #76 — clock
- #102 — work
- #151 — string

## Permissions and access

### Permissions

- `notifications`
- `tabs`
- `<all_urls>`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Low risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

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Source: [Chrome-Stats](https://chrome-stats.com/d/blockclock?hl=ja)