Web Developer Known Issues
Crossed out issues will be fixed in the next release of the extension.
- 'Add Cookie...' does not work with wildcard cookies in Firefox 4
- 'Add User Style Sheet' does not work correctly with 'Persist Features'
- 'Clear Cache' does not clear the offline cache
- 'Delete Domain Cookies' does not delete session cookies
- 'Delete Path Cookies' does not work
- 'Disable Images' does not work with local images
- 'Disable Java' does not work in Firefox 3.6+
- 'Disable Minimum Font Size' does not work with non-Western languages
- 'Disable Styles' does not work with imported style sheets
- 'Display Alt Attributes' does not work with image submit buttons
- 'Display Block Size' and 'Display Image Dimensions' do not update when the browser is resized
- 'Display CSS By Media Type' does not support @media rules
- 'Display Element Information' and 'Display Page Magnifier' do not work with Flash objects
- 'Display Element Information' can display the incorrect positioning for an element
- 'Display Element Information' cannot access all elements on the page
- 'Display Element Information' does not scroll with the viewport
- 'Display Id & Class Details' overwrites the element names from an outline feature
- 'Display Line Guides' does not support frames
- 'Display Page Magnifier' does not work in Firefox 3
- 'Display Page Validation' can resubmit forms multiple times
- 'Display Page Validation' can return inconsistent results
- 'Display Ruler' does not support frames
- 'Display Topographic Information' alters other extension features
- 'Edit CSS' and 'Edit HTML' reset when repositioning the dashboard
- 'Edit CSS' and 'Edit HTML' search features do not always work
- 'Edit CSS' and 'View CSS' do not support character encodings correctly
- 'Edit CSS' does not support :first-letter and :first-line pseudo classes
- 'Edit CSS' does not support frames
- 'Edit CSS' does not work on certain sites with complicated CSS
- 'Edit CSS' does not work with background images that are linked relative to the CSS
- 'Edit HTML' does not allow the entire document to be edited
- 'Edit HTML' does not support frames
- 'Edit HTML' does not work correctly when submitting forms
- 'Edit HTML' saves altered HTML
- 'Hide Background Images' does not work with background images including !important
- 'Outline Custom Elements' does not work with fieldset elements
- 'Outline External Links' does not work with secure links
- 'Populate Form Fields' does not work with form fields without a name attribute
- 'Populate Form Fields' should respect the maxlength attribute of a form element
- 'View Color Information' does not display colors in hover styles
- 'View Cookie Information' can match incorrect domains
- 'View Cookie Information' does not work correctly with Multifox
- 'View Document Outline' does not support HTML5 outlines
- 'View Document Size' does not include background images
- 'View Document Size' does not include font file sizes
- 'View Document Size' does not show the compressed size of secure files
- 'View Form Information' does not show values for select elements
- 'View Image Information' does not show background images
- 'View Source With' no longer works
- 'View Style Information' cannot access all elements on the page
- 'View Style Information' can stop working when viewing CSS in the dashboard
- 'View Style Information' does not show inline styles
- Adding and editing cookies does not work if external site cookies are disabled
- Expanded abbreviations cannot be copied
- Features do not persist correctly when a page in another tab loads in the background
- Image features do not support list item images
- JavaScript on pages generated by the extension does not work with the NoScript extension installed
- Modifying a cookie value deletes the cookie in Firefox 4
- Moving selectable elements also selects text
- Opening the page in another application does not work with Mac applications
- Pages generated by the extension do not appear in the browser history
- Sites with many JavaScript errors and warnings can cause the browser to slow down
- Temporary files used for local validation are not always cleaned up
- The 'Keys' page in the options does not always display correctly
- The element information toolbar does not show and hide correctly when opening a new tab