dessant
commented
2 years ago I have closely followed the reproduction steps, but I could not trigger the bug in Firefox. The user script loads the full-size image (https://i.natgeofe.com/n/3196357c-b9ff-45f3-98d6-9b02517429f9/01booktalkpig.jpg), and I can search with it on Google.
I'm not sure what is causing the issue on your end, but it's possible that you could avoid it by switching to the "Select Image" search mode from the extension's options, that way the extension will always search with the image file instead of the URL.
System
Bug description
This is a strange issue involving an interplay between this extension and a user script.
Here's how I can isolate and reproduce it:
1) Create a new Firefox profile
2) Install Search By Image
3) Install Tampermonkey or GreaseMonkey
4) Install the script from https://greasyfork.org/en/scripts/398189-google-image-direct-view
No customization, everything is at defaults.
5) Navigate to https://www.google.com/search?q=%22Why+We+Love%E2%80%94And+Loathe%E2%80%94The+Humble+Pig%22&tbm=isch
6) Click on the 2nd image (size 374x250)
7) Page will display the image on the right
8) Hover over the image on the right and wait for "image url updated" popup, wait a couple of seconds more then middle-click on the image.
9) The full size image will be loaded in a new tab
10) Right click on the full-size image, select "Search by image" and "google"
11) Google complains that the page is unreachable:
But wait, there's more!
12) Copy the link from step 9 and paste it into a new tab ( the URL is https://i.natgeofe.com/n/3196357c-b9ff-45f3-98d6-9b02517429f9/01booktalkpig.jpg?w=374&h=250 )
13) Right-clicked on the image, selected "Search by image" and "google"
14) Google is happy:
The script author claims they cannot reproduce it, so not much help from them