InstaCalc Firefox

InstaCalc

By: Laz H
InstaCalc is the worlds simplest to use calculator extension for your browser. Begin typing an expression when you are on a page (yes, any page online), and a window will automatically pop up showing the problem and answer!

Features & Capabilities

InstaCalc is the worlds simplest to use calculator extension for your browser. If you need quick calculations when you browse the web, then it doesn’t get any easier.

Begin typing an expression when you are on a page (yes, any page online), and a window will automatically pop up showing the problem and answer!

Example: You are on your favorite shopping website and see that espresso maker you’re thinking about buying for $249 free shipping. But there is another machine you’re considering for $321, plus $8.14 shipping and you want to quickly figure out the difference... Just start typing: 321+8.14-249 and a box will pop up with the result = 80.14

Want a running tape of your inputs while keeping InstaCalc visible? Hit the “=“ key.

Happy with your answer? Hit the Return (enter) key to get back to browsing, or press the 'c' key to first copy your answer then get back to browsing. That’s it.

No flipping between a calculator app and your browser, you don’t even have to click an icon. Just start typing.

User Growth & Download Statistics

Manifest V2 Add-on
By:
Laz H
Daily users:
2 1
Rating:
3.00
(1)
Version:
1.0 Last updated: 2019-08-13
Version code:
4833714
Creation date:
2019-08-12
Risk:
Moderate risk impact Moderate risk likelihood
Content scripts matches:
  • <all_urls>
Size:
104.51KB
Email:
la*****@protonmail.com
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-19
Compare stats and ranking:

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Laz H
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/instacalc/
Email:
la*****@protonmail.com
Website:
https://github.com/lazhh/instacalc

User Reviews

хороший подход, но на некоторых сайтах плагин отключает функцию прокрутки пробелом (space key)
by as*****, 2019-10-02
View all user reviews ›

Is InstaCalc Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

InstaCalc requires a few sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Allows access to all websites, posing a significant security risk as it can monitor and modify data from any visited site.
  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

InstaCalc is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** *** **** *******
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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Best InstaCalc Alternatives

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