Latest Version:
1.2 Updated:
a year ago
Ready to install?
LookStuffUp is available to install from Firefox Add-ons Store and for download from this page.
Available versions
You can find the current and older versions of LookStuffUp here. You can download the archived versions or inspect their source codes.
As a free user, you can download up to 3 latest versions.
Upgrade to download older versions
| Version | Download | Size | Download count | Timestamp |
|---|---|---|---|---|
| 1.2 | XPI · ZIP · Source code | 26.49KB | 0 | 2025-07-15 |
1.2 26.49KB
Install XPI file
An XPI file, short for "XPInstall," is a compressed file format used primarily by Mozilla applications, like Firefox and Thunderbird, to distribute and install add-ons or extensions. These files are similar in function to CRX files for Chrome but cater to the Mozilla ecosystem.
- Simply drag-and-drop the XPI into Firefox to install the add-on.
Install ZIP file
- Download the LookStuffUp ZIP file.
- In Firefox browser, go to
about:addonsto open Add-ons Manager - Click on ⚙, Install Add-on From File

- Select the LookStuffUp ZIP file from step 1. LookStuffUp is now installed on your browser.
Best LookStuffUp Alternatives
Here are some Firefox add-ons that are similar to LookStuffUp:
Context Lookups
Alec Mitnik
Exa Instant Lookup
Jonah Berman
TextCompanion
Jan Riechers
Find it!
Ivan Barsukov
Auto Text Highlighter
AboutAdi
Highlighty Search Find
Game Bài SIN88
Highlighter
Alvaro Cavalcanti
Highlight This: finds and marks words
Wim Deboel
Contextual
londonbrown
Trufflepiggy Context Search A
RakhoiTV
Text Revealer
semanticdata
Search Popup
Krasen Ivanov