Definer Wiki

Appearance

Extension Window ​

The Extension Window opens from the Definer icon in your browser toolbar. Use it when you want to type a word, phrase, or question instead of starting with selected page text.

Definer Extension Window open directly below its browser-toolbar icon, showing a Lumtionary result for nature

If text is already selected on the page, opening the Extension Window uses that selection for the lookup.

Use the pages ​

The tabs at the top separate lookups, quick settings, and information about Definer.

Enter a word, phrase, or question in the search bar. The result uses the same source icons, language choices, Save, History, Recent, Previous, Next, and Routine controls as Definer's other result surfaces. See Lookup results for these shared controls.

Definer Extension Window in the dark theme, showing an AI explanation for nature

Select the tuning icon to open Search Preferences.

Autosend ​

  • Enabled: Get results immediately as you finish typing (default)
  • Disabled: Press "Enter" to submit your search

Keyboard Shortcut ​

You can open the Extension Window quickly using the keyboard shortcut. By default, it's set to "Ctrl + Alt + G".

Settings ​

The Settings page provides convenient access to frequently used customization options without needing to visit the full options page.

Definer Extension Window Settings page open below the browser-toolbar icon, with the website and page Bubble controls enabled

URL Rules ​

Adjust Bubble behavior for the page currently open in the browser. You can turn the Bubble on or off for:

  • The entire domain you're browsing
  • Just the specific page you're currently viewing

Definer Extension Window Settings page with the Bubble disabled for the current page while it remains enabled for the website

Themes and Schedules ​

Quickly change the current theme and schedule with just a few clicks:

  • Theme: Change visual appearance of Definer
  • Schedule: Set up automatic theme switching based on time of day (perfect for transitioning between light and dark modes)

Full Options Page ​

Need more advanced customization? Click OPEN OPTIONS PAGE button to launch Definer Options in a new tab, where you'll find all available settings.

About ​

The About page provides information about Definer and its parent project Lumetrium.

Detached mode ​

Detached mode lets you free the Extension Window from the browser toolbar so you can resize it and position it anywhere on your screen. This is useful if you want to keep the extension window open while working on other tasks or if you prefer a more flexible layout.

To use detached mode:

  1. Open the Extension Window by clicking the Definer icon
  2. Click the three vertical dots (⋮) in the top-right corner
  3. Select "Detach" from the dropdown menu

Once detached, you can move, resize, and reference the window while working elsewhere on your screen.

The current Definer Extension Window menu open below the browser-toolbar icon, with PDF Reader and Detach visible

PDF Reader ​

Select Reader in the Extension Window header to open Definer's PDF Reader. You can also open the three-dot menu shown above and select PDF Reader. The reader accepts a local file or a PDF web address.

Current Definer PDF Reader form with File and URL choices

For more details about working with PDFs in Definer, visit the PDF Reader article.

Extension Window vs Bubble ​

Since both the Popup Bubble and the Extension Window are "popping up" in some way, it's easy to confuse them. However, they serve different purposes and have different functionalities:

A selected-text Bubble beside the same Lumtionary result typed in the browser-toolbar Extension Window

BubbleExtension Window
Appears over text highlighted with mouseOpens from browser toolbar
Designed for quick, contextual lookups on selectLets you type your query directly
Floats above your contentFixed position in your browser
Focused on delivering immediate informationOffers quick customization and management