Add-ons   Development

Introduction to Add-on Development ( 2 ) (30)
Extension development tools (4)
About the Development category (1)
Weird rendering issue when scrolling in a popup (4)
API for removing injected js file using tabs.executeScript()? (4)
Extension works Chrome on but doesn't work on firefox due to [Object] or [Array] XrayWrapper error (1)
Http headers (3)
Firefox Extension: newtab scripts (1)
Passwords API support in WebExtensions (3)
Can Firefox kill my background script if it's out of memory? (7)
Updating a Firefox addon (11)
Using imports (4)
I put some data into storage.sync, but can it be shared? (4)
Using a web extension to package a desktop application (4)
How to remove span elements from webpage (6)
Remove many bookmarks > save all bookmarks (2)
Saving generated file on user drive (12)
Creating a web-extension i18n tool ( 2 ) (32)
Using ES6 modules in background scripts (5)
Focus page instead of address bar on new tab (8)
Optional_permissions - missing `browserSettings` compatibility (6)
Find/restore closed tab by Tab ID (1)
Temporary add-on not loading, not available in sources since last Friday (3)
Specify context (container) AJAX or fetch() (4)
Is it possible to copy weppage output? (4)
Addon Compatability and Legacy FTP Downloads (5)
Is permissions.request() available from options page? +something about it's calling (2)
Intercept FTP request (1)
How to call a javascript function with the addon? (5)
Extensions on pdfjs pages (6)