Unfortunately, this extension decides to use Chrome-specific APIs rather than the standardized (and comprehensive) WebExtensions API. The good news is that people have written portable extensions with identical (or greater) functionality.
As others stated in the thread, ImageBlock and uBlock both have settings to toggle images. There's also ImageBlock X which provides a single button to toggle image blocking, like the extension in this thread.
you can use ublock origin, it has a setting for that. It's pretty much a necessity for me to disable JavaScript and images until i manually enable them. The modern internet is a mess
As others stated in the thread, ImageBlock and uBlock both have settings to toggle images. There's also ImageBlock X which provides a single button to toggle image blocking, like the extension in this thread.