ungoogled-software/ungoogled-chromium

Ability to pause/resume JavaScript execution per-tab

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#901 opened on Dec 31, 2019

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enhancementhelp wanted

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Description

It might be nice to have a way to pause and resume JavaScript execution of a tab via the click of a button. The use-case is for pages that contain a lot of busy JavaScript for content that is designed to be read/viewed.

Considering alternative solutions:

  • DevTools debugging pause/resume - This requires opening DevTools, and it also adds an annoying grey overlay. Otherwise, it seems sufficient for this use-case.
  • Resource filtering like uBlock/uMatrix: Does not deal with the JS used to make a page work. Especially pages that populate the DOM via JS.

Possible issues:

  • Anything that DevTools debugging can cause. For example, some JS events will not fire if the user can interface with the page while JS execution is paused. This may break some page's custom rendering logic.

Contributor guide

Research direction
Investigate Chromium's DevTools debugging pause mechanism and explore how to expose a per tab pause/resume button without the DevTools overlay. Consider implementing a new UI element in the browser toolbar or adding a right click context menu option. Review existing Chromium source code for JavaScript execution control and inter process communication (IPC) between browser and renderer processes.
Tech stack
cpppython
Domain
desktop
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C++Chromium development environment
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20