nicovideo-player-expander icon

nicovideo-player-expander Chrome Extension Analysis

Niche Lifestyle & Gaming Hacks

Chrome extension ID: plgcngmhicjaoicgamcklfceeagoaefa

nicovideo-player-expander is a free, open-source browser extension designed to scale the playback window of NicoNico Video. It provides theater layout and browser-level maximization options with persistent control visibility. It acts as an enhancement tool to restore or improve native video-sizing features on the platform.

Developer:DNEK
Version:4.0
Size:9.48KiB
Last updated:

Overview

Installs

3K+

Rating

★ 5.0

27 reviews

Languages

1 locales

Includes 日本語

Market analysis

Review-backed positioning, friction, and market signals for this Chrome extension.

Backed by review samples

Macro category

Niche Lifestyle & Gaming Hacks

Pricing friction

Low review signal

Complaint intensity

Low review signal

Listing & review signals
Observed signals from store listing text and review samples.

Listing positioning

This extension is positioned as a convenient utility that expands the NicoNico video player into either 'Theater Mode' or 'Maximize in Browser'. It features simple toggling options through a bottom-right player icon or dedicated keyboard shortcuts. The developer explicitly notes compatibility with official platform changes, positioning it as a dual-size management tool for power users.

Inferred product pattern

Free open-source browser utility that patches and enhances layout features on a specific video platform.

Review-backed pain points

Users occasionally encounter layout bugs such as unexpected blank margins when maximizing in the browser. Some users also experience frustration because expanding the player hides the comment sidebar, which they prefer to keep visible.

Observed feature gaps

The extension lacks a dedicated layout mode that retains the comment sidebar on the right side of the expanded video screen. Additionally, changes in the official website's CSS can occasionally cause unexpected rendering layout offsets.

Tags
NicoNico VideoVideo PlayerTheater ModeBrowser Maximize
Target users

- NicoNico Video viewers

- Users seeking customizable player sizes

- Power users utilizing keyboard shortcuts for video playback

Primary use cases

- Expanding the NicoNico video player size to fill the browser window

- Toggling between standard monitor fullscreen and browser-level scaling using shortcuts

Positive themes

- Restoring highly requested layout features that were officially removed

- Ease of use through simple shortcut key controls

- Deep appreciation for the developer filling platform feature gaps

Negative themes

- Desire to keep the comment section visible on the right while the video is expanded

- Layout issues causing uninvited margins/blank space during browser maximization

Observed friction

- No pricing friction is observed as the product is open-source and entirely free.

Evidence boundary: Based on developer documentation, update logs addressing official platform changes, and ten highly positive user reviews detailing feature restoration and minor layout feedback. The evidence is restricted to a small sample size of ten translated Japanese reviews and public store listing details.
Complaint summaries
Review-backed complaint signals grouped by operational area.

Support

No support or account-related complaints were identified in the review samples.

Reliability

One user noted a potential layout bug where an unnatural blank margin space appears when using the 'Maximize in Browser' function.

Privacy

No privacy or security concerns were raised by users.

Access & pricing

- Free usage observed

- No account requirement observed

- Free plan or free usage claimed

Store listing facts

Listing assets

- Screenshots: 1

- Videos: 0

- Languages: 1

Trust signals

- Developer contact

- Official website

Store metadata

- Version: 4.0

- Size: 9.48KiB

- Last updated:

Listing SEO keywords

Search intent keywords
Keyword signals for evaluating how users may discover, compare, or search for this extension category.

Core discovery

nicovideo player expanderniconico theater modeniconico browser fullscreenniconico video layout extension

Comparison

niconico official fullscreen vs expanderniconico theater mode vs default layout

Problem

niconico theater mode missinghow to maximize video on niconico

Alternative

niconico layout optimizernicovideo browser maximize shortcut

Similar extensions

Jump to related discovery paths:

Screenshots

nicovideo-player-expander screenshot

Links

Website: dnek.net

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