Highlight Plus — Help & Guide

Quick start

1. Open the popup (click the extension icon).
2. Enter words separated by spaces in the textbox (e.g. todo bug note).
3. Toggle the switch to enable/disable highlighting.

The extension highlights whole-word matches in the page (case-insensitive).

Popup UI

• Textbox — type highlight words separated by spaces.
• Switch — toggles highlight on/off.
• Donate — link to the project.
• About — this page.
• Report issue — use GitHub Issues if you find bugs (link in the repo).

Examples

• Enter error warning → highlights “error” and “warning”.
• Use multiple words: todo fix review.

Behavior notes & tips

• Words shorter than 2 characters are ignored.
• Matching is case-insensitive.
• Highlighted style cycles through several default color themes.
• If changes in the popup do not appear on the page:
  1. Try reloading the page.
  2. Ensure the extension is allowed on the site (file:// or special pages require permission).
  3. Open the popup again to confirm the saved keywords.
• Disabling Highlight Plus doesn't "undo" past DOM changes made by its content scripts, so any highlight markup already injected into a page will remain until the page is refreshed or a re-injected content script actively removes it.
          Also, when the extension is re-enabled, Chrome does not automatically inject content scripts into already-open tabs, so pages can stay in that "pre-disabled" highlighted state until a navigation or a manual reinjection occurs.

Troubleshooting

• Problem: New words disappear when switching tabs.
  • Fix: Wait ~200ms for the popup to save (or open popup and wait briefly). Update the extension if this persists.
• Problem: “message port closed” console warnings.
  • Fix: Use the latest extension version — fixed in v2.0.2

Reporting bugs / feature requests

If you find a bug or want a feature, please open an issue here.

Template:

1. Bug report / Feature request
    * Type: Bug [] / Feature []
2. Extension version installed: v1.0.x
3. Browser (name and version): e.g. Chrome 114.0.5735.199
4. OS (name and version): e.g. macOS 13.4, Windows 10
5. Steps to reproduce
    * Go to ...
    * Click ...
    * Enter ...
    * Observe...
6. Expected behavior: ...
7. Actual behavior: ...
8. Reproducible URL: ...
9. Console errors / logs: 
    [Paste console output here]
10. Screenshots: ...
11. Additional context: ...
        

Incomplete requests may be closed until updated with missing info.

Production changelog (short)

• v2.0.2 — Fixed view switch from grid/list/kanban/... re-run renders highlighting without toggle.
• v2.0.1 — Fixed css rendering on popup box.
• v2.0.0 — Upgraded jQuery v3.7.1 and updated the highlighter file.
• v1.0.3 — Fixed last.runtime.error and search box auto expand. Added help.md file.
• v1.0.2 — Fixed messaging port issue and popup save behavior.