# Extension (manifest v. 3) runs fine on desktop Firefox, but not on the Android Nightly

**URL:** <https://discourse.mozilla.org/t/extension-manifest-v-3-runs-fine-on-desktop-firefox-but-not-on-the-android-nightly/108092>\
**Category:** Add-on Support\
**Created:** [November 24, 2022, 3:52pm UTC](https://discourse.mozilla.org/t/extension-manifest-v-3-runs-fine-on-desktop-firefox-but-not-on-the-android-nightly/108092 "2022-11-24T15:52:38Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Robert\_Uomini](https://avatars.discourse-cdn.com/v4/letter/r/9d8465/32.png) [@Robert\_Uomini](https://discourse.mozilla.org/u/Robert_Uomini)\
**Post date:** [November 24, 2022, 3:52pm UTC](https://discourse.mozilla.org/t/extension-manifest-v-3-runs-fine-on-desktop-firefox-but-not-on-the-android-nightly/108092/1 "2022-11-24T15:52:38Z")

</div>

My extension, which runs manifest version 3, runs great on the desktop version of the browser, but when I installed it on the current Nightly Firefox, it seems to install OK, but when I tap on the icon, a signin screen should be displayed, like it does on desktop Firefox, but nothing happens. I manually set the Storage permissions with Android settings, so that shouldn’t be the problem. web-ext lint returned one error and five warnings:

ruomini@ruomini-XPS-13-9370:~/Downloads/Firefox/dist$ web-ext lint  
Validation Summary:

errors 1  
notices 0  
warnings 6

ERRORS:

Code Message Description File Line Column  
JS\_SYNTAX\_ERROR JavaScript There is a JavaScript web-ext.js 3 1  
syntax syntax error in your  
error code, which might be  
(Parsing as related to some  
module experimental  
error: JavaScript features  
Unexpected that aren’t an  
character official part of the  
‘!’ at language specification  
line: 1 and and therefore not  
column: 2) supported yet. The  
(Parsing as validation cannot  
script continue on this file.  
error:  
‘import’  
and  
‘export’  
may appear  
only with  
‘sourceTyp…  
e: module’  
at line: 3  
and column:  
1)  
WARNINGS:

Code Message Description File Line Column  
UNSAFE\_VAR\_ASSIGNMENT Unsafe Due to both security assets/ind… 1 1004  
assignment and performance ex.c9f9fbc…  
to concerns, this may not 5.js  
innerHTML be set using dynamic  
values which have not  
been adequately  
sanitized. This can  
lead to security  
issues or fairly  
serious performance  
degradation.  
UNSAFE\_VAR\_ASSIGNMENT Unsafe Due to both security assets/Lis… 12 3332  
assignment and performance t.859b5700…  
to concerns, this may not .js  
innerHTML be set using dynamic  
values which have not  
been adequately  
sanitized. This can  
lead to security  
issues or fairly  
serious performance  
degradation.  
UNSAFE\_VAR\_ASSIGNMENT Unsafe Due to both security assets/Lis… 90 216  
assignment and performance t.859b5700…  
to concerns, this may not .js  
innerHTML be set using dynamic  
values which have not  
been adequately  
sanitized. This can  
lead to security  
issues or fairly  
serious performance  
degradation.  
UNSAFE\_VAR\_ASSIGNMENT Unsafe Due to both security content/ma… 2868 60489  
assignment and performance in.js  
to concerns, this may not  
innerHTML be set using dynamic  
values which have not  
been adequately  
sanitized. This can  
lead to security  
issues or fairly  
serious performance  
degradation.  
UNSAFE\_VAR\_ASSIGNMENT Unsafe Due to both security content/ma… 2879 3332  
assignment and performance in.js  
to concerns, this may not  
innerHTML be set using dynamic  
values which have not  
been adequately  
sanitized. This can  
lead to security  
issues or fairly  
serious performance  
degradation.  
UNSAFE\_VAR\_ASSIGNMENT Unsafe Due to both security content/ma… 2957 216  
assignment and performance in.js  
to concerns, this may not  
innerHTML be set using dynamic  
values which have not  
been adequately  
sanitized. This can  
lead to security  
issues or fairly  
serious performance  
degradation.