jscher2000

Convert any image (WebP, AVIF, etc.) to PNG or JPEG (with choice of quality) for downloading. Right-click context menu calls up format options overlaid on the image. Read the detailed description and check the screenshots for more info.

This extension removes image/webp and/or image/avif from the list of formats Firefox tells sites that it accepts. That discourages many servers from replacing JPEG and PNG images with WebP/AVIF. (But some may send them anyway; they aren't blocked.)

Display info for the current image in a new window, new tab, or overlaid on the image. Convert WEBP images to PNG or JPEG. Send an image URL to TinEye for reverse image search. "View image..." in same tab? Check the screenshots for all the options.

Firefox doesn't follow instructions for downloads? "Always Open Similar Files" is missing? This usually happens because the server sent Firefox a wrong/generic Content-Type header, or forces a download with Content-Disposition. Here's a fix.

Add google.co.uk to your search engines (including search suggestions from google.co.uk). Not an official Google add-on!

Allow Firefox to save "no-store" site icons and get rid of the globe icon for bookmarks. Can't fix sites that don't use favicon.ico site icons. Please read the description before installing.

Add google.com.au to your search engines (including search suggestions from google.com.au). Not an official Google add-on.

Tweak style rules in a page to improve printability. Save as PDF for Windows and Linux.

Activate the last accessed tab in the same window, or any window. Right-click the toolbar button for a most recent tabs list (MRU) and options. Adds "Reload All Tabs" to the tab right-click context menu. (For Fx115/Fx128, use "See all versions".)

Add google.ca to your search engines (including search suggestions from google.ca). Not an official Google add-on.

Intercepts Ctrl+Shift+C, blocks opening developer tools, and copies the selection to the clipboard.

Add a "Show History" button to your toolbar to list your Top Sites. Uses the topSites API to get your frequently visited URLs with minimal permissions. Plentiful configuration options. Please read the Description before installing.

Copy Link button for the main toolbar (or address bar). Use the right-click context menu to "Copy Framed Page URL". See the full description and screenshots for all the "how to."

BROKEN SINCE MAY 2023!! Right-click an email link to compose a new message on Outlook webmail. Right-click a blank area of the page to share a link to it. Pop-out style new tab needs to be closed after sending/discarding your message.

English-language Twitter search plugin based on the one in Firefox 77. This is NOT an official Twitter product.

In case you need more keyboard shortcuts to change tabs.

Right-click an email link to compose a new message in Yahoo mail. Right-click a blank area of the page to share a link to it. Does not work with the "Classic" mail layout. Not an official Yahoo add-on.

Amazon UK search plugin (copied from Mozilla's ver1.13). Bug: if your Amazon UK cookies were cleared or you just launched a private window, the site gives you an error message on the first search. Reload (Ctrl+R) and you should get the results.

Firefox can Print to PDF but some users want to speed it up by skipping the preview. Now you can call Firefox's built-in Save to PDF feature using a toolbar button, keyboard shortcut, or the right-click context menu.

Easily hide comments from a troll using the right-click context menu or trash can icon next to the poster's name. Not an official YouTube extension.

Keep your windows in the order they were opened on the Mac OS Window menu. Optional toolbar button to list windows in the order created. Manifest v3 (Fx109+).

Automatically converts new tabs to new windows instead.

Detects new maximized windows and switches them to resizable instead. Optionally resize and reposition new windows.

Reloading doesn't update your CSS any more? Bypass Firefox's aggressive caching of CSS (and optionally other content) during development. Use the button on the Page Actions menu to grant new host permissions for blocking.

Displays the "Leave Page" prompt to avoid accidentally closing the current window. **BUG** To allow Firefox to shut down, click Stay on page and the Close This Tab button before you exit.