BetterViewer replaces the built-in image viewing mode in Firefox and Chrome-based browsers.
Open source
24 alternativesSelecton
SelectON adds a popup of actions for selected text in Chrome and Firefox, including copy, search, conversion, translation, and link actions.
About Selecton
SelectON is a browser extension for Chrome and Firefox that displays a popup menu of actions when users select text on a webpage. Core actions include copying, searching, converting units or currency, translating text, and opening links related to the selection. It also offers customizable tooltip and text selection appearance, smart text selection snapping with selection handles for editing, a highlighter tool for marking page content, and contextual buttons for tasks like CSS color preview, map lookup, and dictionary lookups via Wikipedia. Currency conversion rates are updated every 2 weeks by default (minimum 7 days, adjustable in settings) and may not be fully accurate, with outputs intended for quick estimation only.
Key features
- Popup actions menu for selected text in Chrome and Firefox
- Customizable tooltip and text selection appearance
- Currency converter for 30+ fiat and 10+ crypto currencies
- Basic unit and timezone conversion tools
- Contextual buttons for links, translation, map, color preview
- Smart text selection snapping and selection handles for editing
Best for: Users who regularly need quick text actions like copying, searching, converting, or translating content while browsing.
Good for
- Compatible with both Chrome and Firefox browsers
- Includes a wide range of built-in text actions in one tool
- Offers customizable appearance and smart text selection features
Watch out for
- Currency conversion data may be inaccurate as rates update every 2 weeks by default (minimum 7 days) and outputs are intended for quick estimation only
- Some features rely on keyword matching in selected text, which may not work for all content
- The extension is not open source, so users cannot audit or modify its code
Selecton at a glance
- Category
- Software & Utilities › Firefox Extensions
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Platforms
- Browser extension
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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Selecton FAQ
How often are currency conversion rates updated?
By default every 2 weeks, with a minimum adjustable update interval of 7 days.
Where can I find the extension's FAQ?
The FAQ is hosted on the project's Wiki page linked in the repository.
Can I contribute to the project without coding experience?
Yes, contributions like translations, currency additions, and keyword updates are accepted without coding.
Is something wrong or out of date?
Tell us and an editor will check it.
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