Vision Test Firefox

Vision Test

By: keller
Test your vision (visual acuity) via Tumbling E chart in your browser!

Features & Capabilities

Vision Test is a simple and easy-to-use test for your eyes. It works based on the principle of how well you can see objects at 6 metes or 20 feet away.

The chart has an E character, which you need to decide the direction of the character only. With this logic, there is no need for a knowledge of English or any other languages. Therefore, this test is suitable for all ages and also individuals with different languages. Simply start the test and stand 1.6 meters or 5 feet away from the monitor. When you see a character on the screen, only decide the direction and wait for the answer to appear at the bottom of the screen. The answer is in green color and also a big font, so you can see it without any problems from distance.

In general, you need to correctly answer at least 50% of the characters at each level, and if you cannot, please stop at that level and record your score. The score is number 20 divided by a number (i.e. 20/100). 20 is the distance in feet which you can see the current character. The other number is the distance which a normal eye can see the character. For example, 20/100 means the objects that you can see in 20 feet, a normal eye can see in 100 feet. In total there are 47 characters to read which takes around 5 minutes to finish. You can adjust the test speed as well, the default time to read each character is 7 seconds.

Note #1: this test is NOT a clinical test for your eyes and has NO diagnostic values at all. It is just a very basic, simple and easy test for your vision's clarity and the result is good for your recordings only. You should NOT rely on the result of this test at all.

Note #2: if you have a feature request or found a bug to report please fill the bug report form in the add-on's homepage.

User Growth & Download Statistics

Manifest V3 Add-on
By:
keller
Daily users:
5 1
Version:
0.1.5 Last updated: 2026-01-26
Version code:
6131456
Creation date:
2019-09-30
Risk:
Very low risk impact Moderate risk likelihood
Permissions:
Size:
40.22KB
Email:
ho*****@gmail.com
URLs:
Website
Full description:
See detailed description
Source:
Firefox Add-ons Store
Data ingested on:
2026-06-03
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:
keller
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/vision-test/
Email:
ho*****@gmail.com
Website:
https://mybrowseraddon.com/vision-test.html

Is Vision Test 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.

Vision Test does not require any sensitive permissions.

Risk impact analysis details
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.

Vision Test 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.
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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