Movie Rating Sync Firefox

Movie Rating Sync

A cross-platform userscript to sync, backup, and migrate your movie ratings between Kinopoisk, IMDb, and Letterboxd.
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Modify request and response headers. No ads, no malware.

Features & Capabilities

  • 🔄 Full Cross-Platform Support — Import and export functionalities are available across all supported websites.
  • 📦 Universal Format — Download your ratings from any service into a structured CSV file.
  • 🧠 Smart Title Matching — Utilizes transliteration, fuzzy search, and release year tolerance to help map titles across different services.
  • ⚡ Dual Sync Modes:
  • Normal Mode — Skips already rated/watched titles to save time.
  • Replace Mode — Overwrites existing ratings with the latest data from your file.
  • 🛡 Adaptive Throttling — Automatically adjusts request speed based on server responses to avoid rate limits (429 errors).
  • 🔍 Deep Search — An optional HTTP search fallback for titles not found in the local cache.
Note on Matching: Title translation and matching across networks is complex. The deep search is not perfect — some rare, indie, or localized titles may require manual adjustment during the sync process.
Service Export Import
Kinopoisk
IMDb
Letterboxd
  1. Log into your profile on the source website (e.g., Kinopoisk).
  2. Click the 📥 Export ratings to CSV button and save the file.
  1. Log into the destination website (e.g., IMDb).
  2. Click 📥 Import (or 🔄 Hard Replace if you want to overwrite existing ratings).
  3. Select your downloaded CSV file and monitor the synchronization process.

User Growth & Download Statistics

Manifest V2 Add-on
By:
Smokelweiss
Daily users:
1
Version:
1.0 Last updated: 2026-07-02
Version code:
6329268
Creation date:
2026-06-29
Risk:
Moderate risk impact High risk likelihood
Permissions:
  • https://www.kinopoisk.ru/*
  • https://graphql.kinopoisk.ru/*
  • https://www.imdb.com/*
  • https://api.graphql.imdb.com/*
  • https://letterboxd.com/*
Content scripts matches:
  • www.kinopoisk.ru
  • www.imdb.com
  • letterboxd.com
Size:
32.64KB
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-08-01
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Smokelweiss
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/movie-rating-sync/
Website:
https://github.com/Smokelweiss/MovieRatingSync

Is Movie Rating Sync Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Movie Rating Sync requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • High Injects scripts into web pages, which may alter or extract site contents, resulting in a substantial risk.
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Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Movie Rating Sync is recently added, and hasn't been around long enough for us to gather enough data to accurately assess its risk level.

Risk likelihood analysis details
  • High This extension was recently updated in the past month. New updates may not be stable or safe.
  • High **** ********* *** *** **** ****** ********* ********** *** *** ** ****** ** *****
  • Medium **** ********* *** ***** ** *** **** * ******* *** ********** *** *** ** ****** ** *****
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