There’s a variety of online tools that you can edit images with. To quickly open images on those websites, check out the PictuTools add-on. That’s an extension which adds a variety of image-editing website shortcuts to Firefox’s context menu.
This is the add-on’s page [1] on the Mozilla website. After adding it the browser, right-click an image to edit. You’ll find the context menu includes a PictuTools submenu on it as below.
[2]
Now select Edit from that submenu. It will open a submenu with a variety of editing sites on it. So select a site from there to open the picture in it as below. Then you can edit the image and save it with the website’s tools and options.
[3]
You can also convert images to alternative formats with this add-on. Right-click an image, and select Convert to choose a format. That will open the Online-Convert website from which it will convert it. Then select Save File to save the image with the converted format.
[4]
To remove items from the PictuTools submenu, click Open menu > Add-ons and press the Options button PictuTools. That will open the page below which includes a text box. There you can enter the services to remove from context menu. Then re-enable the add-on to remove the items entered.
[5]
So PictuTools is a handy add-on to have for editing images on website pages. It gives you quick access to wide variety of image-editing websites, and you can also convert the pictures to other formats directly from its context menu. You can find further details about PictuTools from the add-on’s support site [6].